Acessibilidade / Reportar erro

Vocal symptoms and musculoskeletal pain in non professional voice users

ABSTRACT

Purpose

To identify the presence of vocal symptoms and musculoskeletal pain in non-professional voice users, to verify whether there is a relationship between such variables, and to compare women and men.

Methods

Crosssectional, observational study. Fifty-nine non-professional voice users (NPVU) were included. The data were collected on-line. A characterization questionnaire and self-assessment protocols were applied: Voice Symptoms Scale (VoiSS) and Musculoskeletal Pain Investigation Questionnaire (MPI). A descriptive statistical analysis was performed. The inferential statistics compared the variables between women and men and a correlation analysis was carried out between the VoiSS and MPI using the Spearman correlation test.

Results

For the entire studied group , mean values of the total VoiSS score were observed above the cut-off point, indicating risk for dysphonia. There was musculoskeletal pain in the regions assessed, but at low frequency and mild intensity. Women had a higher frequency of pain in the shoulders, temporal region and larynx, when compared to men. There was a positive correlation between the pain frequency in the regions: neck, temporal region, below the chin and larynx/throat in all or some of MPI scores.

Conclusion

The NPVU population in this study presented with high scores for signs and symptoms of voice disorders. Musculoskeletal pain was rarely present, with mild intensity, but more frequent in women in regions close to the larynx. There was a relationship between vocal symptoms and musculoskeletal pain, especially in regions proximal to the larynx, so that the greater the frequency of pain, the greater the presence of vocal symptoms.

Keywords:
Voice; Musculoskeletal pain; Dysphonia; Voice disorders; Voice quality

RESUMO

Objetivo

Identificar a presença de sintomas vocais e dor musculoesquelética em não profissionais da voz, verificar se há relação entre essas variáveis e comparar o desempenho entre mulheres e homens.

Métodos

Estudo transversal observacional. Participaram 59 indivíduos não profissionais da voz. Os dados foram coletados no meio on-line e aplicou-se questionário de caracterização e os seguintes protocolos de autoavaliação: Escala de Sintomas Vocais e Questionário de Investigação da Dor Musculoesquelética. Foi realizada análise estatística descritiva. A estatística inferencial comparou as variáveis entre mulheres e homens e realizou-se análise de correlação entre as variáveis de ambos os protocolos de autoavaliação por meio do teste de Spearman.

Resultados

Para todo o grupo estudado, observaram-se valores médios do escore total da Escala de Sintomas Vocais acima do ponto de corte do questionário, indicando risco para disfonia. Houve presença de dor nas regiões avaliadas, porém, em frequência baixa e intensidade leve. Verificou-se correlação positiva entre a frequência de dor nas regiões de pescoço, temporal, abaixo do queixo e laringe/garganta e a Escala de Sintomas Vocais. Mulheres apresentaram maior frequência de dor nos ombros, na região temporal e na laringe, quando comparadas aos homens.

Conclusão

A população de não profissionais da voz deste estudo apresentou escores elevados de sintomas de alteração vocal. A dor musculoesquelética foi pouco presente, com intensidade leve, porém, mais frequente em mulheres nas regiões próximas à laringe. Houve relação entre os sintomas vocais e a dor musculoesquelética, especialmente nas regiões proximais à laringe, de maneira que quanto maior a frequência da dor, maior a presença de sintomas vocais.

Palavras-chave:
Voz; Dor musculoesquelética; Disfonia; Distúrbios da voz; Qualidade da voz

INTRODUCTION

The voice plays an important role in interpersonal relationships, whether professional or not. Its quality and characteristics convey information to the interlocutor that goes beyond the verbal content and interferes with message comprehension. Using it inappropriately or in harmful environmental conditions has unfavorable consequences for the person's health(11 Bastilha GR, Andriollo DB, Cielo CA. Profissionais e futuros profissionais da voz: ambiente de trabalho, hábitos vocais incorretos e queixas vocais. Res Soc Dev. 2021;10(2):e53110212531. http://doi.org/10.33448/rsd-v10i2.12531.
http://doi.org/10.33448/rsd-v10i2.12531...
), affecting their quality of life and causing symptoms and complaints.

Many people may have symptoms of vocal changes(22 Ferreira LP, Santos JG, Lima MFB. Sintoma vocal e sua provável causa: levantamento de dados em uma população. Rev CEFAC. 2009;11(1):110-8. http://doi.org/10.1590/S1516-18462009000100015.
http://doi.org/10.1590/S1516-18462009000...
), which is associated with a greater risk of dysphonia(33 Moreti F, Zambon F, Behlau M. Voice symptoms and vocal deviation self-assessment in different types of dysphonia. CoDAS. 2014;26(4):331-3. http://doi.org/10.1590/2317-1782/201420130036. PMid:25211694.
http://doi.org/10.1590/2317-1782/2014201...
). Such symptoms impact emotions and limit the individual's life in different ways; hence, the worse the self-assessment of vocal quality, the greater the reported experience of limitations and emotional issues(33 Moreti F, Zambon F, Behlau M. Voice symptoms and vocal deviation self-assessment in different types of dysphonia. CoDAS. 2014;26(4):331-3. http://doi.org/10.1590/2317-1782/201420130036. PMid:25211694.
http://doi.org/10.1590/2317-1782/2014201...
).

Frequent vocal symptoms are associated with stress(22 Ferreira LP, Santos JG, Lima MFB. Sintoma vocal e sua provável causa: levantamento de dados em uma população. Rev CEFAC. 2009;11(1):110-8. http://doi.org/10.1590/S1516-18462009000100015.
http://doi.org/10.1590/S1516-18462009000...
) – which may be related to complaints of musculoskeletal pain(44 Cardoso JP, Ribeiro IQB, Araújo TM, Carvalho FM, Reis EJFB. Prevalência de dor musculoesquelética em professores. Rev Bras Epidemiol. 2009;12(4):604. http://doi.org/10.1590/S1415-790X2009000400010.
http://doi.org/10.1590/S1415-790X2009000...

5 Cardoso JP, Araújo TM, Carvalho FM, Oliveira NF, Reis EJFB. Aspectos psicossociais do trabalho e dor musculoesquelética em professores. Cad Saude Publica. 2011;27(8):1498-506. http://doi.org/10.1590/S0102-311X2011000800005. PMid:21876998.
http://doi.org/10.1590/S0102-311X2011000...
-66 Suda EY, Coelho AT, Bertaci AC, Santos BB. Relação entre nível geral de saúde, dor musculoesquelética e síndrome de burnout em professores universitários. Fisioter Pesqui. 2011;18(3):270-4. http://doi.org/10.1590/S1809-29502011000300012.
http://doi.org/10.1590/S1809-29502011000...
), and this, in turn, may be associated with vocal use, possibly linked to behavioral dysphonia(77 Ramos AC, Floro RL, Ribeiro VV, Brasolotto AG, Silverio KCA. Musculoskeletal pain and voice-related quality of life in dysphonic and non-dysphonic subjects. J Voice. 2018;32(3):307-13. http://doi.org/10.1016/j.jvoice.2017.05.019. PMid:28647429.
http://doi.org/10.1016/j.jvoice.2017.05....

8 Silverio KCA, Siqueira LTD, Lauris JRP, Brasolotto AG. Muscleskeletal pain in dysphonic women. CoDAS. 2014;26(5):374-81. http://doi.org/10.1590/2317-1782/20142013064. PMid:25388070.
http://doi.org/10.1590/2317-1782/2014201...

9 Constancio S, Moreti F, Guerrieri AC, Behlau M. Dores corporais em teleoperadores e sua relação com o uso da voz em atividades laborais. Rev Soc Bras Fonoaudiol. 2012;17(4):377-84. http://doi.org/10.1590/S1516-80342012000400003.
http://doi.org/10.1590/S1516-80342012000...

10 Vaiano T, Moreti F. Body pain in professional voice users. J Speech Pathol Ther. 2016;1(2):107. http://doi.org/10.4172/2472-5005.1000107.
http://doi.org/10.4172/2472-5005.1000107...

11 Silva Vitor J, Siqueira LTD, Ribeiro VV, Ramos JS, Brasolotto AG, Silverio KCA. Musculoskeletal pain and occupational variables in teachers with voice disorders and in those with healthy voices: a pilot study. J Voice. 2017;31(4):518.e7-13. http://doi.org/10.1016/j.jvoice.2016.12.021. PMid:28216207.
http://doi.org/10.1016/j.jvoice.2016.12....
-1212 Santos AP, Silverio KCA, Dassie-Leite AP, Costa CC, Siqueira LTD. Relation between musculoskeletal pain and voice self-assessment in tele-operators. J Voice. 2019;33(6):948.e11-21. http://doi.org/10.1016/j.jvoice.2018.07.006. PMid:30089538.
http://doi.org/10.1016/j.jvoice.2018.07....
). Neck pain has been reported in such cases, related to inadequate posture, stress, and excessive muscular effort during speech, likewise negatively impacting and limiting various aspects of the individual’s life(44 Cardoso JP, Ribeiro IQB, Araújo TM, Carvalho FM, Reis EJFB. Prevalência de dor musculoesquelética em professores. Rev Bras Epidemiol. 2009;12(4):604. http://doi.org/10.1590/S1415-790X2009000400010.
http://doi.org/10.1590/S1415-790X2009000...
,88 Silverio KCA, Siqueira LTD, Lauris JRP, Brasolotto AG. Muscleskeletal pain in dysphonic women. CoDAS. 2014;26(5):374-81. http://doi.org/10.1590/2317-1782/20142013064. PMid:25388070.
http://doi.org/10.1590/2317-1782/2014201...
,1111 Silva Vitor J, Siqueira LTD, Ribeiro VV, Ramos JS, Brasolotto AG, Silverio KCA. Musculoskeletal pain and occupational variables in teachers with voice disorders and in those with healthy voices: a pilot study. J Voice. 2017;31(4):518.e7-13. http://doi.org/10.1016/j.jvoice.2016.12.021. PMid:28216207.
http://doi.org/10.1016/j.jvoice.2016.12....
).

Behavioral dysphonia is the most common vocal disorder among adults(1313 Martins RHG, do Amaral HA, Tavares ELM, Martins MG, Gonçalves TM, Dias NH. Voice disorders: etiology and diagnosis. J Voice. 2016;30(6):761.e1-9. http://doi.org/10.1016/j.jvoice.2015.09.017. PMid:26547607.
http://doi.org/10.1016/j.jvoice.2015.09....
). The prevalence of vocal changes among nonoccupational voice users is not well defined since the literature presents heterogeneous definitions of who such professionals are(11 Bastilha GR, Andriollo DB, Cielo CA. Profissionais e futuros profissionais da voz: ambiente de trabalho, hábitos vocais incorretos e queixas vocais. Res Soc Dev. 2021;10(2):e53110212531. http://doi.org/10.33448/rsd-v10i2.12531.
http://doi.org/10.33448/rsd-v10i2.12531...
,1010 Vaiano T, Moreti F. Body pain in professional voice users. J Speech Pathol Ther. 2016;1(2):107. http://doi.org/10.4172/2472-5005.1000107.
http://doi.org/10.4172/2472-5005.1000107...
). Nonetheless, studies comparing teachers and nonteachers indicate a 7.5% prevalence of dysphonia in the latter(1414 Behlau M, Zambon F, Guerrieri AC, Roy N. Epidemiology of voice disorders in teachers and nonteachers in Brazil: prevalence and adverse effects. J Voice. 2012;26(5):665.e9-18. http://doi.org/10.1016/j.jvoice.2011.09.010. PMid:22516316.
http://doi.org/10.1016/j.jvoice.2011.09....
).

The literature vastly describes the occurrence of dysphonia and pain symptoms related to intense and inappropriate vocal use in occupational voice users(1515 Rodrigues G, Zambon F, Mathieson L, Behlau M. Vocal tract discomfort in teachers: its relationship to self-reported voice disorders. J Voice. 2013;27(4):473-80. http://doi.org/10.1016/j.jvoice.2013.01.005. PMid:23528674.
http://doi.org/10.1016/j.jvoice.2013.01....
,1616 Tohidast SA, Mansuri B, Bagheri R, Azimi H. Determining pain in patients with voice disorders: a qualitative study. Logoped Phoniatr Vocol. 2021 Dez;46(4):155-62. http://doi.org/10.1080/14015439.2020.1791249. PMid:32657233.
http://doi.org/10.1080/14015439.2020.179...
). However, individuals who do not use their voice occupationally are also likely to develop them(1313 Martins RHG, do Amaral HA, Tavares ELM, Martins MG, Gonçalves TM, Dias NH. Voice disorders: etiology and diagnosis. J Voice. 2016;30(6):761.e1-9. http://doi.org/10.1016/j.jvoice.2015.09.017. PMid:26547607.
http://doi.org/10.1016/j.jvoice.2015.09....
,1717 Cielo CA, Ribeiro VV, Hoffmann CF. Sintomas vocais de futuros profissionais da voz. Rev CEFAC. 2015;17(1):34-43. http://doi.org/10.1590/1982-0216201517013.
http://doi.org/10.1590/1982-021620151701...
,1818 Sheyona V, Devadas U. The prevalence and impact of voice problems in nonprofessional voice users: preliminary findings. J Voice. 2022;36(3):383-8. http://doi.org/10.1016/j.jvoice.2020.06.010. PMid:32660848.
http://doi.org/10.1016/j.jvoice.2020.06....
) – although the literature scarcely addresses symptoms of vocal changes in people whose voices are not the main tool of their trade(1414 Behlau M, Zambon F, Guerrieri AC, Roy N. Epidemiology of voice disorders in teachers and nonteachers in Brazil: prevalence and adverse effects. J Voice. 2012;26(5):665.e9-18. http://doi.org/10.1016/j.jvoice.2011.09.010. PMid:22516316.
http://doi.org/10.1016/j.jvoice.2011.09....
,1919 Moreti F, Zambon F, Oliveira G, Behlau M. Cross-cultural adaptation, validation, and cutoff values of the Brazilian version of the voice symptom scale - VoiSS. J Voice. 2014;28(4):458-68. http://doi.org/10.1016/j.jvoice.2013.11.009. PMid:24560004.
http://doi.org/10.1016/j.jvoice.2013.11....
).

Thus, the occurrence of such findings among nonoccupational voice users and whether these factors are related in them cannot yet be defined. Such information is important because it can help identify the risk of dysphonia in individuals who do not use their voice professionally. Thus, this study aimed to identify vocal symptoms and musculoskeletal pain in non-professional voice users, verify whether these variables are related, and compare men’s and women’s performances.

METHODS

This cross-sectional, observational, quantitative study was approved by the Research Ethics Committee of the originating institution under evaluation report number 3.180.318. All participants signed an informed consent form after receiving guidance and clarifications regarding procedures and data confidentiality.

The study was developed online on Survey Monkey®, following the guidelines of the Brazilian General Personal Data Protection Law (Law no. 13,709/2018). Data were collected between May and June 2022. The research inclusion criteria were not using the voice professionally or recreationally and being 18 to 60 years old. This study defined occupational voice users as singers, actors, teachers, pedagogues, music therapists, pastors, priests, lawyers, psychologists, physical therapists, speech-language-hearing pathologists, and intern undergraduate students in any of these areas. It also defined recreational voice use as activities other than their primary source of income, such as amateur singers and actors. The exclusion criteria were individuals diagnosed with hearing loss, smokers, ex-smokers for less than 5 years, and those who reported having undergone voice therapy at some point in their lives.

All participants answered a questionnaire with identification data (age, sex, state, city, occupation, working hours, chronic diseases, hormonal disorders, laryngeal surgeries, diagnosis of hearing loss, and cigarette use and time of use).

The study also collected responses to the Voice Symptom Scale (VoiSS), validated for Brazilian Portuguese(1919 Moreti F, Zambon F, Oliveira G, Behlau M. Cross-cultural adaptation, validation, and cutoff values of the Brazilian version of the voice symptom scale - VoiSS. J Voice. 2014;28(4):458-68. http://doi.org/10.1016/j.jvoice.2013.11.009. PMid:24560004.
http://doi.org/10.1016/j.jvoice.2013.11....
), and the Musculoskeletal Pain Investigation Questionnaire (MPI), adapted by the authors of a previous study(88 Silverio KCA, Siqueira LTD, Lauris JRP, Brasolotto AG. Muscleskeletal pain in dysphonic women. CoDAS. 2014;26(5):374-81. http://doi.org/10.1590/2317-1782/20142013064. PMid:25388070.
http://doi.org/10.1590/2317-1782/2014201...
).

The VoiSS was used to self-assess symptoms of vocal changes in three domains: impairment (functioning, with 15 items), emotional (with eight items), and physical (regarding organic symptoms, with seven items), totaling 30 items evaluated on a 5-point Likert scale, in which 0 referred to “never” and 4 referred to “always”. The VoiSS total score, calculated by simply summing the score of each question, indicates the overall level of vocal symptoms. The maximum score is 120 points – 60 in the impairment domain (cutoff: 11.5), 32 in the emotional domain (cutoff: 1.5), and 28 in the physical domain (cutoff: 6.5). The cutoff for the total score is 16 points(1919 Moreti F, Zambon F, Oliveira G, Behlau M. Cross-cultural adaptation, validation, and cutoff values of the Brazilian version of the voice symptom scale - VoiSS. J Voice. 2014;28(4):458-68. http://doi.org/10.1016/j.jvoice.2013.11.009. PMid:24560004.
http://doi.org/10.1016/j.jvoice.2013.11....
).

The MPI presents a drawing of body parts to be evaluated, namely: the temporal region, masseters, submandibular region, larynx, front and back of the neck, shoulders, upper and lower back, elbows, wrists, hands, fingers, hips, thighs, knees, ankles, and feet. The MPI has two parts – in the first one, the participant indicates the frequency of pain in each drawn body part in the previous 12 months, using a scale ranging from 0 to 3 points, in which 0 indicates “no”, 1 indicates “rarely”, 2 indicates “frequently”, and 3 indicates “always”. In the second part of the questionnaire, the participant checks the intensity of the pain in each region, using a 100-millimeter Visual Analog Scale (VAS) – the closer to the left end, the milder the pain; the closer to the right, the greater the pain. The literature on ​​pain provides reference values ​​for assessing pain intensity using a 100-mm VAS, as follows: 0 to 4 mm correspond to the absence of pain; 5 to 44 mm correspond to mild pain; 45 to 74 mm correspond to moderate pain and 75 to 100 mm correspond to severe pain(2020 Jensen MP, Chen C, Brugger AM. Interpretation of visual analog scale ratings and change scores: a reanalysis of two clinical trials of postoperative pain. J Pain. 2003;4(7):407-14. http://doi.org/10.1016/S1526-5900(03)00716-8. PMid:14622683.
http://doi.org/10.1016/S1526-5900(03)007...
).

Data were analyzed in the Jamovi statistical software, version 2.0. The Shapiro-Wilk normality test was applied to verify the distribution of quantitative variables, followed by descriptive analysis of all participants’ findings in a single group, indicating the means and standard deviations of variables with normal distribution and interquartile ranges of variables without normal distribution and ordinal qualitative variables.

The data were compared by dividing participants into male and female groups to verify differences in the study variables per sex. Student's t-test or Mann-Whitney test was used for comparative analyses, setting the significance level at 5%, with a 95% confidence interval.

A correlation matrix between VoiSS and MPI variables was performed using Spearman's correlation test. The strength of the correlation was classified according to previously established criteria(2121 Dancey C, Reidy J. Estatística sem matemática para psicologia. Porto Alegre: Penso; 2013.), considering correlation coefficient (rho) values ​​between 0.10 and 0.39 as weak, between 0.40 and 0.69 as moderate, and between 0.70 and 1.00 as strong. The correlation considered a 1% significance level and a 99% confidence interval.

RESULTS

Altogether, 100 individuals answered the study questionnaires, of which 59 (35 women and 24 men) remained in the sample after applying the inclusion and exclusion criteria. Their mean age was 29 years and 8 months (± 10.7), with a mean weekly workload of 22.1 hours (± 19.5); 44.8% (n = 26) of them were students, 32.8% (n = 20) worked in offices, and the remainder were retired (n = 2), unemployed (n = 2), and self-employed or service providers (n = 9).

The mean total VoiSS score was above the cutoff proposed by the questionnaire (16 points), suggesting a risk of dysphonia. Since the maximum VoiSS score differs for each domain, their scores were transformed into percentages to identify which one had the highest mean score. Hence, the physical domain had the highest score in percentages. The results for the total group of participants are shown in Table 1.

Table 1
Means and standard deviations ​​extracted from the impairment, emotional, physical, and total domains of the Voice Symptom Scale

The median MPI values indicate that pain was absent or rare in most body regions in question. The medians also ​​indicated mild pain in all such regions. The results of pain frequency and intensity are shown in Table 2.

Table 2
Means, standard deviations, medians, and quartiles 1 and 3 of the frequency and intensity of musculoskeletal pain

The comparison between men and women found no significant differences in any of the VoiSS domain scores, and its mean total score was above the cutoff in both groups. On the other hand, the comparison showed differences in MPI in the frequency of pain in the shoulder (p = 0.023), temporal region (p = 0.016), and larynx/throat (p = 0.019) – it was more frequent in women in all cases with a difference. The descriptive and comparative data between the groups of women and men are presented in Table 3.

Table 3
Means, standard deviations, medians, and comparison ​​between men and women for all variables

The following MPI regions were correlated with one or more VoiSS domain scores: neck with VoiSS physical domain; temporal region with VoiSS total and physical domain; submental region with VoiSS total and physical domain; and larynx/throat with VoiSS total and physical domain (Table 4). All these correlations were positive, being moderate between the temporal region and the VoiSS physical domain and weak in all other correlations. Pain intensity was not correlated with any VoiSS score in any region investigated by the pain protocol.

Table 4
Variables from the Musculoskeletal Pain Investigation Questionnaire correlated with domain scores of the Voice Symptom Scale

DISCUSSION

This study aimed to identify and relate vocal symptoms and musculoskeletal pain in non-professional voice users. Few studies have analyzed these aspects in individuals whose voices are not the main tools of their trade. Thus, these results may help identify the risk of dysphonia in non-professional voice users and its relationship with pain.

The characterization data show that most study participants were young adults under 30 years old, which justifies the high number of students. Their mean age was lower than in another study with nonoccupational voice users, but the percentage of students (between 30% and 40%) was similar(1818 Sheyona V, Devadas U. The prevalence and impact of voice problems in nonprofessional voice users: preliminary findings. J Voice. 2022;36(3):383-8. http://doi.org/10.1016/j.jvoice.2020.06.010. PMid:32660848.
http://doi.org/10.1016/j.jvoice.2020.06....
). This suggests that many individuals who do not use their voice professionally have not yet entered the job market. Their workload was lower than that described in other studies investigating pain in workers(2222 Siqueira LTD, dos Santos AP, Silva RLF, Moreira PAM, Vitor JS, Ribeiro VV. Vocal self-perception of home office workers during the COVID-19 pandemic. J Voice. 2023;37(1):144.e15-22. http://doi.org/10.1016/j.jvoice.2020.10.016. PMid:33250356.
http://doi.org/10.1016/j.jvoice.2020.10....
), although the standard deviation was high. Long working hours, especially when they require sitting, are known to cause musculoskeletal pain(2323 van Niekerk SM, Louw QA, Hillier S. The effectiveness of a chair intervention in the workplace to reduce musculoskeletal symptoms: a systematic review. BMC Musculoskelet Disord. 2012 Ago 13;13(1):145. http://doi.org/10.1186/1471-2474-13-145. PMid:22889123.
http://doi.org/10.1186/1471-2474-13-145...
) and consequently affect postural adjustments, which may somehow affect voice production. Such factors may have influenced the results of this study.

The mean total VoiSS score above the cutoff showed that, on average, the study population was at risk for dysphonia(1919 Moreti F, Zambon F, Oliveira G, Behlau M. Cross-cultural adaptation, validation, and cutoff values of the Brazilian version of the voice symptom scale - VoiSS. J Voice. 2014;28(4):458-68. http://doi.org/10.1016/j.jvoice.2013.11.009. PMid:24560004.
http://doi.org/10.1016/j.jvoice.2013.11....
). The physical domain had the highest percentage score, suggesting that participants reported physical (organic) symptoms such as coughing, pain, and throat clearing or phlegm. Although this was not the initial study hypothesis, these results may have been due to collecting data for this research near the third COVID-19 wave in Brazil – a disease that affected a considerable portion of the population and can cause vocal changes and complaints of vocal tract discomfort(2424 Tohidast SA, Mansuri B, Memarian M, Ghobakhloo AH, Scherer RC. Voice quality and vocal tract discomfort symptoms in patients with COVID-19. J Voice. 2024;38(2):542.e29-33. http://doi.org/10.1016/j.jvoice.2021.09.039. PMid:34776316.
http://doi.org/10.1016/j.jvoice.2021.09....
). Therefore, post-COVID vocal symptoms may have relevantly increased the vocal symptoms reported by the sample population – especially as the physical domain had the highest percentage score, involving organic sensations of vocal changes. Other studies have also pointed out COVID-19 as a possible influential factor for the increased prevalence of vocal changes in the population(2525 Naunheim MR, DeVore EK, Huston MN, Song PC, Franco RA Jr, Bhattacharyya N. Increasing prevalence of voice disorders in the USA: updates in the COVID era. Laryngoscope. 2024 Ago;134(8):3713-8. http://doi.org/10.1002/lary.31409. PMid:38525993.
http://doi.org/10.1002/lary.31409...
).

One aspect that caught our attention in this study was the lack of difference in vocal symptoms between men and women. Several studies indicate that women are at greater risk of dysphonia(1616 Tohidast SA, Mansuri B, Bagheri R, Azimi H. Determining pain in patients with voice disorders: a qualitative study. Logoped Phoniatr Vocol. 2021 Dez;46(4):155-62. http://doi.org/10.1080/14015439.2020.1791249. PMid:32657233.
http://doi.org/10.1080/14015439.2020.179...
,1818 Sheyona V, Devadas U. The prevalence and impact of voice problems in nonprofessional voice users: preliminary findings. J Voice. 2022;36(3):383-8. http://doi.org/10.1016/j.jvoice.2020.06.010. PMid:32660848.
http://doi.org/10.1016/j.jvoice.2020.06....
). Therefore, their VoiSS domains’ scores ​were expected to differ from the male group. Again, it is suspected that the pandemic may have interfered with these results. Further studies are needed with a balanced number of participants per sex, considering occupational issues and airway diseases in the short and medium term, especially COVID-19 and long COVID symptoms.

In the MPI, participants generally reported absent or infrequent musculoskeletal pain in all regions investigated. Nevertheless, despite being interpreted as mild through the VAS(2020 Jensen MP, Chen C, Brugger AM. Interpretation of visual analog scale ratings and change scores: a reanalysis of two clinical trials of postoperative pain. J Pain. 2003;4(7):407-14. http://doi.org/10.1016/S1526-5900(03)00716-8. PMid:14622683.
http://doi.org/10.1016/S1526-5900(03)007...
), pain intensity was above the values ​​found in a study with dysphonic and non-dysphonic individuals, considering the values ​​of both groups with the same questionnaire in a non-digital format(88 Silverio KCA, Siqueira LTD, Lauris JRP, Brasolotto AG. Muscleskeletal pain in dysphonic women. CoDAS. 2014;26(5):374-81. http://doi.org/10.1590/2317-1782/20142013064. PMid:25388070.
http://doi.org/10.1590/2317-1782/2014201...
). This finding can be justified by the greater number of individuals working remotely in recent years, without preparation or adequate ergonomic working conditions(2222 Siqueira LTD, dos Santos AP, Silva RLF, Moreira PAM, Vitor JS, Ribeiro VV. Vocal self-perception of home office workers during the COVID-19 pandemic. J Voice. 2023;37(1):144.e15-22. http://doi.org/10.1016/j.jvoice.2020.10.016. PMid:33250356.
http://doi.org/10.1016/j.jvoice.2020.10....
). The high number of online meetings and the lack of ergonomics in the home office are also related to vocal changes, due to the increased demand for vocal use caused by the large number of video calls and high workload(2626 Siqueira LTD, Vitor JS, Santos AP, Silva RLF, Moreira PAM, Veis Ribeiro V. Influence of the characteristics of home office work on self-perceived vocal fatigue during the COVID-19 pandemic. Logoped Phoniatr Vocol. 2022;47(4):279-83. http://doi.org/10.1080/14015439.2021.1961310. PMid:34379044.
http://doi.org/10.1080/14015439.2021.196...
).

Most participants in this study were students or worked in offices, sitting down, usually in front of a computer. No information was collected about their work model (from home or at the company) or study model (remote or in-person). However, ergonomic issues in the environment may be relevant in both in-person and remote scenarios. A study comparing telemarketers and the general population found body pain in both groups, but more so in telemarketers(99 Constancio S, Moreti F, Guerrieri AC, Behlau M. Dores corporais em teleoperadores e sua relação com o uso da voz em atividades laborais. Rev Soc Bras Fonoaudiol. 2012;17(4):377-84. http://doi.org/10.1590/S1516-80342012000400003.
http://doi.org/10.1590/S1516-80342012000...
), which points again to ergonomics in classrooms and offices during remote work or teaching. Such factors may have contributed to the findings of this research and should be better explored in future studies.

The comparison of pain frequency and intensity between men and women showed that the latter had more frequent pain in the shoulders, larynx/throat, and temporal region. A study with people working from home during the pandemic identified an increased frequency of musculoskeletal pain in the neck, shoulders, and lower back, and more pain in women than in men, due to worse ergonomics at work(2727 MacLean KFE, Neyedli HF, Dewis C, Frayne RJ. The role of at home workstation ergonomics and gender on musculoskeletal pain. Work. 2022;71(2):309-18. http://doi.org/10.3233/WOR-210692. PMid:35095004.
http://doi.org/10.3233/WOR-210692...
). Still, considering the high frequency of vocal symptoms in the present study, such results are noteworthy since dysphonic women(88 Silverio KCA, Siqueira LTD, Lauris JRP, Brasolotto AG. Muscleskeletal pain in dysphonic women. CoDAS. 2014;26(5):374-81. http://doi.org/10.1590/2317-1782/20142013064. PMid:25388070.
http://doi.org/10.1590/2317-1782/2014201...
) or people with hyperfunctional dysphonia(77 Ramos AC, Floro RL, Ribeiro VV, Brasolotto AG, Silverio KCA. Musculoskeletal pain and voice-related quality of life in dysphonic and non-dysphonic subjects. J Voice. 2018;32(3):307-13. http://doi.org/10.1016/j.jvoice.2017.05.019. PMid:28647429.
http://doi.org/10.1016/j.jvoice.2017.05....
) report pain more often than those without dysphonia, especially in regions proximal to the larynx, such as the ones described above.

The correlation analysis showed that the frequency of pain in the neck and the temporal, submandibular (below the chin), and laryngeal regions was related to physical (organic) vocal symptoms – i.e., the more vocal symptoms, the greater the frequency of pain. Pain in the temporal, submandibular, and laryngeal regions was also related to the total VoiSS score, indicating that the greater the vocal symptoms, the greater the pain in these regions (also called regions proximal to the larynx). A study found that vocal tract discomfort is related to symptoms of an incipient vocal change(1515 Rodrigues G, Zambon F, Mathieson L, Behlau M. Vocal tract discomfort in teachers: its relationship to self-reported voice disorders. J Voice. 2013;27(4):473-80. http://doi.org/10.1016/j.jvoice.2013.01.005. PMid:23528674.
http://doi.org/10.1016/j.jvoice.2013.01....
). Another one found that dysphonic people’s voice-related quality of life is more related to both the frequency and intensity of pain in the larynx and proximal regions(77 Ramos AC, Floro RL, Ribeiro VV, Brasolotto AG, Silverio KCA. Musculoskeletal pain and voice-related quality of life in dysphonic and non-dysphonic subjects. J Voice. 2018;32(3):307-13. http://doi.org/10.1016/j.jvoice.2017.05.019. PMid:28647429.
http://doi.org/10.1016/j.jvoice.2017.05....
).

The literature has shown that pain occurs mostly in the throat, neck, and back of non-professional voice users(1010 Vaiano T, Moreti F. Body pain in professional voice users. J Speech Pathol Ther. 2016;1(2):107. http://doi.org/10.4172/2472-5005.1000107.
http://doi.org/10.4172/2472-5005.1000107...
). Moreover, individuals with vocal complaints report more pain than those without complaints(88 Silverio KCA, Siqueira LTD, Lauris JRP, Brasolotto AG. Muscleskeletal pain in dysphonic women. CoDAS. 2014;26(5):374-81. http://doi.org/10.1590/2317-1782/20142013064. PMid:25388070.
http://doi.org/10.1590/2317-1782/2014201...
,1515 Rodrigues G, Zambon F, Mathieson L, Behlau M. Vocal tract discomfort in teachers: its relationship to self-reported voice disorders. J Voice. 2013;27(4):473-80. http://doi.org/10.1016/j.jvoice.2013.01.005. PMid:23528674.
http://doi.org/10.1016/j.jvoice.2013.01....
); hence, vocal changes not only affect the structures involved in vocal production but are also related to any tension that causes discomfort during phonation(1515 Rodrigues G, Zambon F, Mathieson L, Behlau M. Vocal tract discomfort in teachers: its relationship to self-reported voice disorders. J Voice. 2013;27(4):473-80. http://doi.org/10.1016/j.jvoice.2013.01.005. PMid:23528674.
http://doi.org/10.1016/j.jvoice.2013.01....
). Thus, the greater the frequency of pain in the larynx and proximal regions, the greater the presence of vocal symptoms – findings that may be associated with the presence of dysphonia(88 Silverio KCA, Siqueira LTD, Lauris JRP, Brasolotto AG. Muscleskeletal pain in dysphonic women. CoDAS. 2014;26(5):374-81. http://doi.org/10.1590/2317-1782/20142013064. PMid:25388070.
http://doi.org/10.1590/2317-1782/2014201...
,1111 Silva Vitor J, Siqueira LTD, Ribeiro VV, Ramos JS, Brasolotto AG, Silverio KCA. Musculoskeletal pain and occupational variables in teachers with voice disorders and in those with healthy voices: a pilot study. J Voice. 2017;31(4):518.e7-13. http://doi.org/10.1016/j.jvoice.2016.12.021. PMid:28216207.
http://doi.org/10.1016/j.jvoice.2016.12....
), especially when it is caused by muscle tension(2828 Cielo CA, Christmann MK, Ribeiro VV, Hoffmann CF, Padilha JF, Steidl EMS, et al. Síndrome de tensão musculoesquelética, musculatura laríngea extrínseca e postura corporal: considerações teóricas. Rev CEFAC. 2014;16(5):1639-49. http://doi.org/10.1590/1982-0216201410613.
http://doi.org/10.1590/1982-021620141061...
).

Therefore, musculoskeletal pain in regions close to the larynx, despite being greater and more frequent in occupational voice users(2929 van Lierde KM, Dijckmans J, Scheffel L, Behlau M. Type and severity of pain during phonation in professional voice users and nonvocal professionals. J Voice. 2012;26(5):671.e19-23. http://doi.org/10.1016/j.jvoice.2011.11.008. PMid:22285456.
http://doi.org/10.1016/j.jvoice.2011.11....
), may be a symptom of dysphonia and should be taken into account in the vocal assessment of individuals with complaints (regardless of whether they use it professionally) since dysphonia is present in the general population(1818 Sheyona V, Devadas U. The prevalence and impact of voice problems in nonprofessional voice users: preliminary findings. J Voice. 2022;36(3):383-8. http://doi.org/10.1016/j.jvoice.2020.06.010. PMid:32660848.
http://doi.org/10.1016/j.jvoice.2020.06....
), and the prevalence of vocal symptoms has increased in recent years(2525 Naunheim MR, DeVore EK, Huston MN, Song PC, Franco RA Jr, Bhattacharyya N. Increasing prevalence of voice disorders in the USA: updates in the COVID era. Laryngoscope. 2024 Ago;134(8):3713-8. http://doi.org/10.1002/lary.31409. PMid:38525993.
http://doi.org/10.1002/lary.31409...
). Speech-language-hearing pathologists must pay attention to individuals who spend much of the day sitting, whether working or studying, when surveying their medical history or assessing their voices. Postural imbalances can generate inappropriate tension and interfere with voice production, impacting their health and quality of life. Research on ergonomics commonly finds musculoskeletal pain in the back and upper limbs(3030 Gómez-Galán M, Callejón-Ferre ÁJ, Pérez-Alonso J, Díaz-Pérez M, Carrillo-Castrillo JA. Musculoskeletal risks: RULA bibliometric review. Int J Environ Res Public Health. 2020;17(12):4354. http://doi.org/10.3390/ijerph17124354. PMid:32560566.
http://doi.org/10.3390/ijerph17124354...
), usually associated with inadequate posture during work activities(2323 van Niekerk SM, Louw QA, Hillier S. The effectiveness of a chair intervention in the workplace to reduce musculoskeletal symptoms: a systematic review. BMC Musculoskelet Disord. 2012 Ago 13;13(1):145. http://doi.org/10.1186/1471-2474-13-145. PMid:22889123.
http://doi.org/10.1186/1471-2474-13-145...
). Therefore, studies should also investigate vocal complaints in workers with musculoskeletal pain.

The limitations of this study include the sample size, mainly due to the lack of consensus in the literature about which professionals use their voices as a tool of their trade. In addition, the lack of information on COVID-19 infection, the occurrence of other airway diseases, and the current work modality (whether from home or in-person) also posed biases to this research. Another limiting factor was that it did not collect data on the use of protective masks. The fact that MPI is not a validated instrument also posed a bias to this study. However, its use is justified by the number of voice studies with different populations that also used it(77 Ramos AC, Floro RL, Ribeiro VV, Brasolotto AG, Silverio KCA. Musculoskeletal pain and voice-related quality of life in dysphonic and non-dysphonic subjects. J Voice. 2018;32(3):307-13. http://doi.org/10.1016/j.jvoice.2017.05.019. PMid:28647429.
http://doi.org/10.1016/j.jvoice.2017.05....
,1010 Vaiano T, Moreti F. Body pain in professional voice users. J Speech Pathol Ther. 2016;1(2):107. http://doi.org/10.4172/2472-5005.1000107.
http://doi.org/10.4172/2472-5005.1000107...

11 Silva Vitor J, Siqueira LTD, Ribeiro VV, Ramos JS, Brasolotto AG, Silverio KCA. Musculoskeletal pain and occupational variables in teachers with voice disorders and in those with healthy voices: a pilot study. J Voice. 2017;31(4):518.e7-13. http://doi.org/10.1016/j.jvoice.2016.12.021. PMid:28216207.
http://doi.org/10.1016/j.jvoice.2016.12....
-1212 Santos AP, Silverio KCA, Dassie-Leite AP, Costa CC, Siqueira LTD. Relation between musculoskeletal pain and voice self-assessment in tele-operators. J Voice. 2019;33(6):948.e11-21. http://doi.org/10.1016/j.jvoice.2018.07.006. PMid:30089538.
http://doi.org/10.1016/j.jvoice.2018.07....
).

Further studies are needed to compare vocal symptoms and musculoskeletal pain between nonoccupational and occupational voice users. The discussion raised important questions regarding the pandemic since the study population was expected to have few vocal symptoms. This indicates the need for further population studies to verify the effects of the pandemic on communication disorders, focusing on the voice and longitudinal comprehension of the findings. Increasing the number of participants, especially with a balance between men and women, may elucidate other questions, such as the relationship between pain and vocal symptoms according to sex since it is known that women are at greater risk of dysphonia than men. Future studies should also include other data on health, work, and study models (in-person and remote) to find possible associations between variables.

CONCLUSION

The individuals in this study (non-professional voice users) had vocal symptoms compatible with the risk of dysphonia. The frequency of musculoskeletal pain was low in all regions studied and, when present, its intensity was mild. However, vocal symptoms were related to the frequency of musculoskeletal pain in the larynx and proximal regions. Also, women had pain in the shoulders, temporal region, and larynx more often than men.

  • Study carried out at Universidade Federal do Rio Grande do Norte – UFRN – Natal (RN), Brasil.
  • Funding:

    None.

REFERÊNCIAS

  • 1
    Bastilha GR, Andriollo DB, Cielo CA. Profissionais e futuros profissionais da voz: ambiente de trabalho, hábitos vocais incorretos e queixas vocais. Res Soc Dev. 2021;10(2):e53110212531. http://doi.org/10.33448/rsd-v10i2.12531
    » http://doi.org/10.33448/rsd-v10i2.12531
  • 2
    Ferreira LP, Santos JG, Lima MFB. Sintoma vocal e sua provável causa: levantamento de dados em uma população. Rev CEFAC. 2009;11(1):110-8. http://doi.org/10.1590/S1516-18462009000100015
    » http://doi.org/10.1590/S1516-18462009000100015
  • 3
    Moreti F, Zambon F, Behlau M. Voice symptoms and vocal deviation self-assessment in different types of dysphonia. CoDAS. 2014;26(4):331-3. http://doi.org/10.1590/2317-1782/201420130036 PMid:25211694.
    » http://doi.org/10.1590/2317-1782/201420130036
  • 4
    Cardoso JP, Ribeiro IQB, Araújo TM, Carvalho FM, Reis EJFB. Prevalência de dor musculoesquelética em professores. Rev Bras Epidemiol. 2009;12(4):604. http://doi.org/10.1590/S1415-790X2009000400010
    » http://doi.org/10.1590/S1415-790X2009000400010
  • 5
    Cardoso JP, Araújo TM, Carvalho FM, Oliveira NF, Reis EJFB. Aspectos psicossociais do trabalho e dor musculoesquelética em professores. Cad Saude Publica. 2011;27(8):1498-506. http://doi.org/10.1590/S0102-311X2011000800005 PMid:21876998.
    » http://doi.org/10.1590/S0102-311X2011000800005
  • 6
    Suda EY, Coelho AT, Bertaci AC, Santos BB. Relação entre nível geral de saúde, dor musculoesquelética e síndrome de burnout em professores universitários. Fisioter Pesqui. 2011;18(3):270-4. http://doi.org/10.1590/S1809-29502011000300012
    » http://doi.org/10.1590/S1809-29502011000300012
  • 7
    Ramos AC, Floro RL, Ribeiro VV, Brasolotto AG, Silverio KCA. Musculoskeletal pain and voice-related quality of life in dysphonic and non-dysphonic subjects. J Voice. 2018;32(3):307-13. http://doi.org/10.1016/j.jvoice.2017.05.019 PMid:28647429.
    » http://doi.org/10.1016/j.jvoice.2017.05.019
  • 8
    Silverio KCA, Siqueira LTD, Lauris JRP, Brasolotto AG. Muscleskeletal pain in dysphonic women. CoDAS. 2014;26(5):374-81. http://doi.org/10.1590/2317-1782/20142013064 PMid:25388070.
    » http://doi.org/10.1590/2317-1782/20142013064
  • 9
    Constancio S, Moreti F, Guerrieri AC, Behlau M. Dores corporais em teleoperadores e sua relação com o uso da voz em atividades laborais. Rev Soc Bras Fonoaudiol. 2012;17(4):377-84. http://doi.org/10.1590/S1516-80342012000400003
    » http://doi.org/10.1590/S1516-80342012000400003
  • 10
    Vaiano T, Moreti F. Body pain in professional voice users. J Speech Pathol Ther. 2016;1(2):107. http://doi.org/10.4172/2472-5005.1000107
    » http://doi.org/10.4172/2472-5005.1000107
  • 11
    Silva Vitor J, Siqueira LTD, Ribeiro VV, Ramos JS, Brasolotto AG, Silverio KCA. Musculoskeletal pain and occupational variables in teachers with voice disorders and in those with healthy voices: a pilot study. J Voice. 2017;31(4):518.e7-13. http://doi.org/10.1016/j.jvoice.2016.12.021 PMid:28216207.
    » http://doi.org/10.1016/j.jvoice.2016.12.021
  • 12
    Santos AP, Silverio KCA, Dassie-Leite AP, Costa CC, Siqueira LTD. Relation between musculoskeletal pain and voice self-assessment in tele-operators. J Voice. 2019;33(6):948.e11-21. http://doi.org/10.1016/j.jvoice.2018.07.006 PMid:30089538.
    » http://doi.org/10.1016/j.jvoice.2018.07.006
  • 13
    Martins RHG, do Amaral HA, Tavares ELM, Martins MG, Gonçalves TM, Dias NH. Voice disorders: etiology and diagnosis. J Voice. 2016;30(6):761.e1-9. http://doi.org/10.1016/j.jvoice.2015.09.017 PMid:26547607.
    » http://doi.org/10.1016/j.jvoice.2015.09.017
  • 14
    Behlau M, Zambon F, Guerrieri AC, Roy N. Epidemiology of voice disorders in teachers and nonteachers in Brazil: prevalence and adverse effects. J Voice. 2012;26(5):665.e9-18. http://doi.org/10.1016/j.jvoice.2011.09.010 PMid:22516316.
    » http://doi.org/10.1016/j.jvoice.2011.09.010
  • 15
    Rodrigues G, Zambon F, Mathieson L, Behlau M. Vocal tract discomfort in teachers: its relationship to self-reported voice disorders. J Voice. 2013;27(4):473-80. http://doi.org/10.1016/j.jvoice.2013.01.005 PMid:23528674.
    » http://doi.org/10.1016/j.jvoice.2013.01.005
  • 16
    Tohidast SA, Mansuri B, Bagheri R, Azimi H. Determining pain in patients with voice disorders: a qualitative study. Logoped Phoniatr Vocol. 2021 Dez;46(4):155-62. http://doi.org/10.1080/14015439.2020.1791249 PMid:32657233.
    » http://doi.org/10.1080/14015439.2020.1791249
  • 17
    Cielo CA, Ribeiro VV, Hoffmann CF. Sintomas vocais de futuros profissionais da voz. Rev CEFAC. 2015;17(1):34-43. http://doi.org/10.1590/1982-0216201517013
    » http://doi.org/10.1590/1982-0216201517013
  • 18
    Sheyona V, Devadas U. The prevalence and impact of voice problems in nonprofessional voice users: preliminary findings. J Voice. 2022;36(3):383-8. http://doi.org/10.1016/j.jvoice.2020.06.010 PMid:32660848.
    » http://doi.org/10.1016/j.jvoice.2020.06.010
  • 19
    Moreti F, Zambon F, Oliveira G, Behlau M. Cross-cultural adaptation, validation, and cutoff values of the Brazilian version of the voice symptom scale - VoiSS. J Voice. 2014;28(4):458-68. http://doi.org/10.1016/j.jvoice.2013.11.009 PMid:24560004.
    » http://doi.org/10.1016/j.jvoice.2013.11.009
  • 20
    Jensen MP, Chen C, Brugger AM. Interpretation of visual analog scale ratings and change scores: a reanalysis of two clinical trials of postoperative pain. J Pain. 2003;4(7):407-14. http://doi.org/10.1016/S1526-5900(03)00716-8 PMid:14622683.
    » http://doi.org/10.1016/S1526-5900(03)00716-8
  • 21
    Dancey C, Reidy J. Estatística sem matemática para psicologia. Porto Alegre: Penso; 2013.
  • 22
    Siqueira LTD, dos Santos AP, Silva RLF, Moreira PAM, Vitor JS, Ribeiro VV. Vocal self-perception of home office workers during the COVID-19 pandemic. J Voice. 2023;37(1):144.e15-22. http://doi.org/10.1016/j.jvoice.2020.10.016 PMid:33250356.
    » http://doi.org/10.1016/j.jvoice.2020.10.016
  • 23
    van Niekerk SM, Louw QA, Hillier S. The effectiveness of a chair intervention in the workplace to reduce musculoskeletal symptoms: a systematic review. BMC Musculoskelet Disord. 2012 Ago 13;13(1):145. http://doi.org/10.1186/1471-2474-13-145 PMid:22889123.
    » http://doi.org/10.1186/1471-2474-13-145
  • 24
    Tohidast SA, Mansuri B, Memarian M, Ghobakhloo AH, Scherer RC. Voice quality and vocal tract discomfort symptoms in patients with COVID-19. J Voice. 2024;38(2):542.e29-33. http://doi.org/10.1016/j.jvoice.2021.09.039 PMid:34776316.
    » http://doi.org/10.1016/j.jvoice.2021.09.039
  • 25
    Naunheim MR, DeVore EK, Huston MN, Song PC, Franco RA Jr, Bhattacharyya N. Increasing prevalence of voice disorders in the USA: updates in the COVID era. Laryngoscope. 2024 Ago;134(8):3713-8. http://doi.org/10.1002/lary.31409 PMid:38525993.
    » http://doi.org/10.1002/lary.31409
  • 26
    Siqueira LTD, Vitor JS, Santos AP, Silva RLF, Moreira PAM, Veis Ribeiro V. Influence of the characteristics of home office work on self-perceived vocal fatigue during the COVID-19 pandemic. Logoped Phoniatr Vocol. 2022;47(4):279-83. http://doi.org/10.1080/14015439.2021.1961310 PMid:34379044.
    » http://doi.org/10.1080/14015439.2021.1961310
  • 27
    MacLean KFE, Neyedli HF, Dewis C, Frayne RJ. The role of at home workstation ergonomics and gender on musculoskeletal pain. Work. 2022;71(2):309-18. http://doi.org/10.3233/WOR-210692 PMid:35095004.
    » http://doi.org/10.3233/WOR-210692
  • 28
    Cielo CA, Christmann MK, Ribeiro VV, Hoffmann CF, Padilha JF, Steidl EMS, et al. Síndrome de tensão musculoesquelética, musculatura laríngea extrínseca e postura corporal: considerações teóricas. Rev CEFAC. 2014;16(5):1639-49. http://doi.org/10.1590/1982-0216201410613
    » http://doi.org/10.1590/1982-0216201410613
  • 29
    van Lierde KM, Dijckmans J, Scheffel L, Behlau M. Type and severity of pain during phonation in professional voice users and nonvocal professionals. J Voice. 2012;26(5):671.e19-23. http://doi.org/10.1016/j.jvoice.2011.11.008 PMid:22285456.
    » http://doi.org/10.1016/j.jvoice.2011.11.008
  • 30
    Gómez-Galán M, Callejón-Ferre ÁJ, Pérez-Alonso J, Díaz-Pérez M, Carrillo-Castrillo JA. Musculoskeletal risks: RULA bibliometric review. Int J Environ Res Public Health. 2020;17(12):4354. http://doi.org/10.3390/ijerph17124354 PMid:32560566.
    » http://doi.org/10.3390/ijerph17124354

Publication Dates

  • Publication in this collection
    27 Sept 2024
  • Date of issue
    2024

History

  • Received
    08 Apr 2024
  • Accepted
    16 June 2024
Academia Brasileira de Audiologia Rua Itapeva, 202, conjunto 61, CEP 01332-000, Tel.: (11) 3253-8711 - São Paulo - SP - Brazil
E-mail: revista@audiologiabrasil.org.br