Systematic review of evidence on the association between personality and tinnitus ^{☆ ☆☆}

Abstracts

INTRODUCTION:

The scientific literature that personality traits are associated with the individual's adaptation to chronic diseases, becoming an important factor in the etiology and prognosis of physical illness. Some studies indicate that personality characteristics may influence the perception of tinnitus.

OBJECTIVE:

To assess the scientific evidence of the association between tinnitus and personality.

METHODS:

A systematic review in the following databases: PubMed, SciELO, LILACS and Web of knowledge. Were selected only studies with patients older than 18 years, published in English, Portuguese or Spanish who established an association between tinnitus and personality.

RESULTS:

Seventeen of the 77 articles found were selected: 13 cross-sectional studies, two longitudinal studies, one validation study, and one birth cohort study. The samples ranged from 27 to 970 patients.

CONCLUSION:

Some personality traits, especially neuroticism, psychasthenia, and schizoid aspects, may be associated with tinnitus perception and with the annoyance due to this symptom.

Personality; Tinnitus; MMPI; Review

INTRODUÇÃO:

Sabe-se, na literatura científica, que características de personalidade estão associadas à adaptação do indivíduo a doenças crônicas, tornando-se um fator importante na etiologia e prognóstico de doenças físicas. Alguns estudos apontam que características de personalidade podem influenciar na percepção do zumbido.

OBJETIVO:

Verificar as evidências científicas da associação entre zumbido e personalidade.

MÉTODO:

Estudo de revisão sistemática nas seguintes bases de dados: Pubmed, Scielo, Lilacs e Web of knowledge. Foram selecionados apenas os estudos com pacientes maiores de 18 anos, publicados em inglês, português ou espanhol, que estabeleceram uma associação entre zumbido e personalidade.

RESULTADOS:

Dos 77 artigos encontrados, 17 foram selecionados: 13 estudos transversais, dois longitudinais, um estudo de validação e um estudo coorte de nascimento. As amostras variaram de 27 a 970 pacientes.

CONCLUSÃO:

Algumas características de personalidade, especialmente neuroticismo, psicastenia e aspectos esquizoides, podem estar associados à percepção e ao incômodo do zumbido.

Personalidade; Zumbido; MMPI; Revisão

Introduction

Tinnitus is defined as a perception of sound in the absence of an external sound source.^{1 and 2} It is a symptom that may be related to a number of biological, pharmacological, nutritional, and psychological etiologies, and most often multiple etiologic factors are involved.³ Pavan⁴ reported that approximately 20% of the general population suffers from some form of tinnitus. Other studies have reported incidences of 10-32% of the population.^{1 and 5}

In most cases, tinnitus is a symptom perceived only by the patient, and it is not possible to measure it objectively. The discomfort from tinnitus is subjective and variable with respect to intensity and frequency, and can significantly impact the patient's life and cause adverse personal, professional, social, and family consequences. Twenty percent of patients with chronic tinnitus report it to be severe and disabling.^{1 and 6}

Tinnitus is a symptom that has physical and psychological dimensions and a comprehensive approach requires a multidisciplinary team to provide appropriate assessment and treatment for the affected patients.^{7 and 8}

Many researchers suggest that psychological characteristics may be related to the impact of tinnitus on the lives of patients. Patients with severe tinnitus may have hysterical defenses, depressive and/or anxiety symptoms, stress, irritability, difficulty concentrating and sleeping, negative effects in mood, and impairment in performing daily activities.^{7 , 8 , 9 , 10 and 11}

Personality can be defined as an aggregate of characteristics that distinguish one individual from all others. Some theorists consider that personality is the essence of the human condition.¹² Personality involves the totality of psychic dynamics, and its formation evolves from the interaction of genetic, physiological, emotional, cognitive, social, and cultural factors. It is the personality that determines thinking, attitudes, beliefs, the way of perceiving the world and relating to other people, and it also has an impact on health and disease processes.^{13 and 14} In the realm of personality, conscious and unconscious aspects, behaviors, affective-emotional experiences, intrapsychic conflicts, thoughts, and feelings are all considered. The structure of personality is relatively stable and predictable, and the dynamics of personality determine how the individual relates to the environment.

The assessment of personality can be conducted by mental health professionals by means of structured or semi-structured clinical interviews based on DSM-IV-TR,¹⁵ or by psychologists using psychological assessment instruments. There are a variety of psychological assessment instruments able to assess personality structure and dynamics; these can be objective instruments (even self-administered) or projective expressive methods.^{16 and 17} The use of these instruments is restricted to psychologists.^{18 and 19}

In the scientific literature, there are many articles studying the association of personality to health and disease process. The articles describe the characteristics of personality as an important factor in the etiology and prognosis of physical illnesses when associated with other factors.²⁰ Welch and Dawes²¹ comment that personality characteristics may influence the perception of tinnitus. There is scant literature regarding studies of the personality characteristics of tinnitus patients. To date, no research on the subject has been published in Brazil.

The objective of this study was to assess the scientific evidence of the association between tinnitus and personality.

Method

A systematic review of published articles on tinnitus and personality indexed in the databases PubMed, Web of Knowledge, SciELO, and LILACS was performed.

The inclusion criteria were studies published in English, Portuguese, or Spanish until 2013 with patients older than 18 years that established an association between tinnitus and personality. Studies that correlated symptoms of anxiety and/or depressive symptoms with tinnitus, studies on personality characteristics in patients with dizziness or chronic disease, letters to the editor, and theoretical studies were excluded.

In the search strategy for PubMed, descriptors of the Medical Subject Headings (MeSH terms) were used and the strategy chosen was as follows: Tinnitus [Mesh] AND (Personality [Mesh] OR Personality Disorders [Mesh] OR MMPI [Mesh]) AND (English [lang] OR Spanish [lang] OR Portuguese [lang]) AND adult [MeSH Terms].

In the Web of Knowledge database, the strategy was (TS = (personality) AND TS = (Tinnitus)) AND Language = (English OR Portuguese OR Spanish) AND Document Types = (Article OR Review) Databases = SCI-EXPANDED, SSCI, A&HCI, CPCI-S, CPCI-SSH Timespan = All years.

In the SciELO and LILACS databases, indexed descriptors in the Health Sciences Descriptors Headings (MeSH terms) were used, and the following strategy was implemented: tinnitus AND personality OR personality determination OR personality disorders OR personality tests OR MMPI (Minnesota Multiphasic Personality Inventory).

Results

Access to the articles was performed by online distribution via the CAPES Portal; and by the attendance of researchers to BIREME to access printed journals and purchase items from the public health library.

In all, 43 studies in PubMed and 45 studies in Web of Knowledge were found; 11 articles were common to both databases. No studies were found in the LILACS and SciELO databases. In total, 77 articles were collected for the period 1968-2012.

The selection of papers to be included in the review was performed by two reviewers after reading the 77 articles; 17^{21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 and 37} articles that met the inclusion criteria were selected, and 60 articles were excluded. Articles were excluded because they did not present an association between personality and tinnitus. Most of them associated psychopathological symptoms (such as anxiety and depression) to tinnitus. Ten articles were excluded because they studied an association among personality or psychological characteristics and non-otologic chronic diseases or otologic diseases except tinnitus; and one article was excluded because it was a theoretical study, not dealing with scientific research (Fig. 1).

Figure 1
Results

Two reviewers tabulated data of selected articles using the following information: authors, year of publication, study type, sample size, instruments for personality assessment used, and main results of the association between tinnitus and personality (Table 1).

Table 1
Description of papers showing an association between personality and tinnitus regarding the instruments used.

Authors and year	Study type	Sample	Personality assessment instruments	Major outcomes associated with tinnitus patients and conclusion
Reich GE and Jonhson RM, 1984.	Transversal	146	MMPI 168 (Minnesota Multiphasic Personality Inventory – 168 short version)	High scores of neuroticism (hysteria, hypochondria, and depression) and in the scales of schizophrenia and paranoia.
Gerber K, Nehemkis AM, Charter RA, Jones HC, 1985–1986.	Transversal	45	Minnesota Multiphasic Personality Inventory (MMPI)	Pathological levels in the scales of hypochondria and depression.
O’Connor S, Hawthorne MR, Britten SR, Webber P, 1987.	Transversal	105	Eysenck Personality Questionnaire (EPQ)	9.5% had high neuroticism scores, but no significant correlation with severe tinnitus annoyance.
Collet L, Moussu MF, Dubreuil C, Disant F, Ahami T, Chanal JM, Morgon A, 1987.	Longitudinal prospective	27	MMPI	There were statistically significant differences associated to scales of depression, schizophrenia, and psychasthenia.
Collet L, Moussu MF, Disant F, Ahami T, Morgon A, 1990.	Transversal	100	MMPI	Men showed high levels on the depression scale. Psychasthenia is associated with hearing loss, and hypochondria is associated with a long symptomatic period.
Mckee GJ, Stephens SDG, 1992.	Transversal	37	Crown-Crisp Experiential Index	High scores of neuroticism.
Russo J, Katon W, Sullivan M, Clark M, Buchwald D, 1994.	Transversal	224	Structured Psychiatric Diagnostic Interview Schedule based on DSM-III-R; Cloninger's Tridimensional Personality.	Higher scores of pessimism, worry, impulsivity, neuroticism, and negative affectivity.
Meric C, Gartner M, Collet L, Chéry-Croze S, 1998.	Transversal	281	MMPI	Scores of neuroticism stand out
Rutter DR, Stein MJ, 1999.	Transversal	248	EPQ	Higher scores for neuroticism, but not statistically significant when compared to patients with chronic diseases.
Zachariae R, Mirz F, Johansen LY, Andersen SE, Bjerring P, Pedersen CB, 2000.	Validation	50	EPQ	High scores of neuroticism.
Vallianatou NG, Christodoulou P, Nestoros JN, Helidonis E, 2001.	Transversal	80	MMPI	Scores within average. Only the depression scale was higher.
Bayar N, Oguztürk O, Koç C, 2002.	Transversal	56	MMPI	High scores on psychasthenia scale. Women also had higher scores on hypochondria, hysteria, schizophrenia, and social introversion scales.
Lagenbach M, Olderog M, Michel O, Albus C, Köhle K, 2005.	Longitudinal prospective	48	Symptom Checklist 90-Revised (SCL-90-R), Freibürger Persönlichkeitsinventar (FPI-R)	Statistically significant differences in scores of somatization, anxiety, and somatic complaints; and psychoticism, excitability, and tension.
Langguth B, Kleinjung T, Fischer B, Hajak G, Eichhammer P, Sand PG, 2007.	Transversal	72	NEO-Five Factor Inventory (NEO-FFI),	The traits of anxiety and neuroticism are associated with the presence of depressive symptoms and the severity of tinnitus.
Welsh D, Dawes PJD, 2008.	Cohort Longitudinal prospective	970	MPQ (Multidimensional Personality Questionnaire)	Personality traits may be associated with tinnitus.
Bartels H, Pedersen SS, Van der Laan BF, Staal MJ, Albers FW, Middel B, 2010.	Transversal	265	DS-14 (Type D Scale - 14)	The prevalence of patients with a pessimistic personality (type D personality) was 35.5%.
Bartels H, Middel B, Pedersen SS, Staal MJ, Albers FWJ, 2010.	Transversal	530	EPQ, DS-14, FFPI (Five-Factor Personality Inventory).	The personality traits of neuroticism and pessimism (type D) are prevalent in patients with tinnitus.

The 17 selected articles included 13 cross-sectional studies,^{22 , 23 , 24 , 26 , 27 , 28 , 29 , 30 , 32 , 33 , 35 , 36 and 37} two prospective longitudinal studies,^{25 and 34} one validation study,³¹ and one birth cohort study.²¹ These studies^{21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 and 37} demonstrate that there are associations between some personality characteristics and tinnitus perception and the annoyance caused by this symptom. The samples ranged from 27 to 970 patients.

Studies have demonstrated that there is a predominance of certain personality characteristics in patients with tinnitus, such as neuroticism^{22 , 24 , 27 , 28 , 29 , 30 , 31 , 34 , 35 and 37} (neurotic triad: hysteria,^{22 , 27 and 33} hypochondria,^{23 and 33} and depression),^{23 , 25 , 26 , 27 , 32 , 35 , 36 and 37} psychasthenia,^{25 , 26 and 33} and schizoid features.^{22 , 25 , 33 and 34}

Neuroticism involves a broad range of negative personality characteristics due to the presence of psychological distress, anxiety, and behavioral cognitive impairment.³⁸ The affected subjects are anxious, prone to emotional instability and mood swings, and have a tendency to self-deprecation and exaggerated concerns, especially in relation to body and health, who tend to overreact to many different types of stimuli and to interpret situations more seriously than they are; they are likely to exhibit physical symptoms with no organic etiology, devitalization, and a tendency toward depression.^{13 and 38}

Psychasthenia is associated with the presence of intense anxiety and a significant nervous breakdown. Psychasthenic people exhibit impulsive, obsessive, and phobic tendencies, mental rumination behavior, psychomotor agitation, diffuse or systematic fear, anxiety associated with physical symptoms, and a tendency to experience distressing feelings.^{13 and 39}

Individuals with a high score of schizophrenia refer to the presence of schizoid aspects of their personality. They are solitary people with emotional vulnerability, who avoid social contact, feel threatened and persecuted, and have difficulty distinguishing fantasy from reality, have an affinity for strange and unusual things, and a tendency to hostility and wickedness.¹³

The most widely used instrument for assessing personality traits is the Minnesota Multiphasic Personality Inventory (MMPI)^{22 , 23 , 24 , 25 , 26 , 29 and 32} (seven studies); this is a psychological test that can detect psychopathological and personality traits, and is widely used in the scientific literature. The other instruments used were as follows: Eysenck Personality Questionnaire^{24 , 30 , 31 and 37} (EPQ, four studies), Type D Scale^{36 and 37} (two studies), Structured Psychiatric Diagnostic Interview²⁸ (one study), NEO Five-Factor Inventory³⁵ (one study), Five-Factor Personality Inventory 37 (one study), Multidimensional Personality Questionnaire²¹ (MPQ, one study), Freibürger Persönlichkeitsinventar ³⁴ (one study), Crown-Crisp Experiential Index ²⁷ (one study), and Cloninger's Tridimensional Personality Questionnaire ²⁸ (one study), associating audiological and otological assessments with detailed questionnaires about tinnitus.

Discussion

The majority of studies selected were cross-sectional.^{22 , 23 , 24 , 26 , 27 , 28 , 29 , 30 , 32 , 33 , 35 , 36 and 37} Cross-sectional and validation studies cannot establish predictive relationships between personality characteristics found in groups of tinnitus patients; however, they were able to detect that the groups of patients with tinnitus present more personality disorders such as neuroticism, psychasthenia, and schizoid features than the general population.^{21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 and 37} These characteristics may influence patients' perception of tinnitus, their discomfort, and the meaning that they assign to this annoyance, thereby making it difficult to live with chronic tinnitus and worsening its impact on their lives.

All individuals are exposed to the demands and pressures imposed by the events of ordinary life and, to cope with anxiety and concerns, utilize their emotional resources. Patients with tinnitus have fewer resources to cope with anxiety and affective distress, and tend to experience their distressing emotions more intensely. These patients have a personality structure less adapted and more susceptible to physical manifestations of their suffering, and an exacerbated concern about the body and the discomfort of tinnitus. These characteristics may be associated with the fact that tinnitus can cause the patient to suffer emotional overload and intense anxiety, just as occurs in other chronic diseases.

The most relevant retrieved studies were two prospective longitudinal studies^{25 and 34} and one study of birth cohort.²¹ Studies indicate some personality characteristics as predictors of increased suffering of tinnitus and poor patient compliance to their symptoms, defining the impact of tinnitus in their life, its severity, and annoyance.^{21 , 25 and 34} Patients who report severe annoyance with tinnitus have specific personality traits and psychopathological symptoms that combine to lower the patients' satisfaction with their life and hinder their adaptation to chronic tinnitus.^{25 and 34} The cohort study of Welsh and Dawes,²¹ with 970 patients, assessed the personality characteristics of patients at 32 years of age, and found an association among personality characteristics and the presence of tinnitus. These data suggest that the treatment for these patients must rely on the help of mental health professionals, alleviating their psychological distress, the anxiety, and emotional, social, and relational injuries that certain personality traits may cause.

Only one study used a structured clinical interview for the diagnosis of the personality structure and dynamics.²⁸ The remaining studies used objective psychological tests to evaluate personality.^{22 , 23 , 24 , 25 , 26 , 27 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 and 37} Projective psychological tests were not used. This fact may be related to the practicality of use and ease of application of objective tests. However, there are some limitations in the use of objective tests of personality, in association with the dependence on how the individual really perceives himself/herself; whether he/she is answering to what really matches his/her way of being, or instead in relation to what he/she would like it to be. Another important limitation of these tests is that objective tests can assess the general tendency of patients to respond to the environment where they live, but cannot distinguish between the structural features and the dynamic characteristics of personality. Carlson⁴⁰ manifested his concern about the personality researchers, when he chose to use objective instruments that restrict the personality to psychometric measures that disregard feelings, context of life, interpersonal relationships, intrapsychic conflicts, and the dynamics of the personality functioning.

It is important to mention that it is impossible to establish a specific personality profile of tinnitus patients; only the presence of certain personality characteristics can be detected in this population; these features are also found in patients with chronic diseases, such as chronic pain,⁴¹ headache,^{42 and 43} fibromyalgia,⁴³ and asthma.⁴⁴ Some studies show that patients with complaints of physical symptoms have higher neuroticism scores than healthy individuals.^{45 , 46 and 47}

Conclusion

Most studies show a significant association between personality characteristics and tinnitus. These characteristics may be associated with the perception and annoyance of tinnitus, and contribute to the difficulty of patients' adaptation to the chronic symptom.

There is a need for further research using more comprehensive personality assessment instruments that can contribute to a better understanding of this phenomenon.

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• ☆
  Please cite this article as: Mucci S, Geocze L, Abranches DC, Antúnez AE, Penido NO. Systematic review of evidence on the association between personality and tinnitus. Braz J Otorhinolaryngol. 2014;80:441-7.
• ☆☆
  Institution: Department of Otorhinolaryngology and Head and Neck Surgery, Universidade Federal de São Paulo (UNIFESP-EPM), São Paulo, SP, Brazil.

Publication Dates

• Publication in this collection
  Sep-Oct 2014

History

• Received
  05 Aug 2013
• Accepted
  07 Nov 2013