Correlation between vocal handicap and quality of life of popular singers

Carvalho, Christina Guedes de Oliveira; Ribeiro, Maysa Ferreira Martins

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Original Article • CoDAS 33 (4) • 2021 • https://doi.org/10.1590/2317-1782/20202019136 copy

Correlation between vocal handicap and quality of life of popular singers

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Purpose

To evaluate the correlation between vocal handicap index and the quality of life of popular singers.

Methods

Transversal study. The data was collected through personal interviews and the use of the following instruments: World Health Organization Quality of Life-bref (WHOQOL-bref), the Modern Singing Handicap Index (MSHI) and a questionnaire about the singer’s sociodemographic profiles and their self-perceived complaints. The level of significance was 5% (p <0.05). A descriptive analysis of the WHOQOL-bref and the IDCM scores was done using absolute and relative frequencies, mean and standard deviation. Quantitative variables were tested with Komolgorov-Smirnov, using non-parametric tests Kruskal Wallis and U Mann-Whitney. Correlation between the WHOQOL-bref and MSHI instruments was made with Spearman's Correlation Test. Reliability of the instruments tested by Cronbach's Alpha test.

Results

Sample of 206 popular singers who were mostly man, single, with higher education or postgraduate and income of up to six minimum wages a month. Majority of them had high scores in WHOQOL-bref, indicating self-perception of good quality of life. Most singers report vocal complaints. The ones without vocal complaints showed self-perception of a better quality of life and lower vocal handicap with meaningful statistical significance in all WHOQOL-bref domains and MSHI subscales. Singers over 40 years old and with higher incomes showed better perception of their quality of life and lower vocal handicap. There was negative or weak correlation between the MSHI and the WHOQOL-bref.

Conclusion

Better quality of life had correlation among the group with lower vocal handicap.

Keywords
Quality of Life; Singing; Speech Therapy; Self-Assessment; Voice

Instruments	n	Average	SD	Min	Max
*WHOQOL-Bref*
Physical Domain	206	68.78	14.32	7.14	96.43
Psychological Domain	206	70.13	13.24	16.67	95.83
Social Relations Domain	206	69.34	17.14	0	100.00
Environment	206	60.82	13.19	18.75	96.88
MSHI
Disability Domain	206	8.96	6.71	0	31.00
HandicapDomain	206	6.02	5.79	0	27.00
Defect Domain	206	10.90	7.95	0	34.00
Total MSHI	206	25.88	18.88	0	79.00

Instruments	n	Average	SD	Min	Max	P value
*WHOQOL-Bref*
Physical Domain
no complaints	94	72.42	15.92	7.14	96.43	<0.01
with complaints	112	65.72	12.07	39.29	92.86	<0.01
Psychological Domain
no complaints	94	75.13	12.06	41.67	95.83	<0.01
with complaints	112	65.92	12.76	16.67	91.67	<0.01
Social Relations Domain
no complaints	94	73.23	15.93	25.00	100.00	<0.01
with complaints	112	66.07	17.50	0.00	100.00	<0.01
Environment
no complaints	94	64.63	12.88	25.00	96.88	<0.01
with complaints	112	57.62	12.64	18.75	96.88	<0.01
MSHI
Disability Domain
no complaints	94	5.51	4.66	0.00	20.00	<0.01
with complaints	112	11.86	6.81	0.00	31.00	<0.01
HandicapDomain
no complaints	94	3.60	4.68	0.00	27.00	<0.01
with complaints	112	8.06	5.85	0.00	26.00	<0.01
Defect Domain
no complaints	94	6.06	5.29	0.00	27.00	<0.01
with complaints	112	14.96	7.54	3.00	34.00	<0.01
Total MSHI
no complaints	94	15.17	13.17	0.00	72.00	<0.01
with complaints	112	34.88	18.28	5.00	79.00	<0.01

Instrument/Variable		n	Average	SD	Min	Max	P value
*WHOQOL-Bref*
Physical Domain
	1 to 3 MW^A	81	66.01	14.81	7.14	96.43	0.018
Income	4 to 6 MW^B	77	68.60	13.49	39.29	96.43
	> 6 MW^{C; A; B}	48	73.74	13.71	35.71	96.43
	18 to 30 years	90	68.18	13.50	35.71	96.43	0.416
Age Group	31 to 40 years	53	67.32	15.45	7.14	96.43
	> 40 years	63	70.86	14.47	35.71	96.43
Marital Status	No Companion	139	68.55	13.13	39.29	96.43	0.509
	With Companion	67	69.24	16.61	7.14	96.43	0.509

Psychological Domain
	1 to 3 MW^A	81	68.16	12.90	37.50	91.67	0.002
Income	4 to 6 MW^B	77	68.18	14.43	16.67	91.67
	> 6 MW^{C; A; B}	48	76.56	9.44	54.17	95.83
	18 to 30 years	90	68.33	12.84	37.50	91.67	0.001
Age Group	31 to 40 years	53	67.37	13.40	16.67	91.67
	> 40 years	63	75.00	12.52	37.50	95.83
Marital Status	No Companion	139	69.99	13.27	37.50	95.83	0.895
	With Companion	67	70.40	13.26	16.67	95.83	0.895

Social Relations Domain
	1 to 3 MW^A	81	66.77	18.19	0.00	100.00	0.027
Income	4 to 6 MW^B	77	68.72	16.34	33.33	100.00
	> 6 MW^{C; A; B}	48	74.65	15.66	25.00	100.00
	18 to 30 years	90	70.19	16.14	0.00	100.00	0.005
Age Group	31 to 40 years	53	63.05	18.74	25.00	100.00
	> 40 years	63	73.41	15.83	25.00	100.00
Marital Status	No Companion	139	70.68	16.98	0.00	100.00	0.045
	With Companion	67	66.54	17.26	25.00	100.00	0.045

Environment Domain
	1 to 3 MW^A	81	55.21	12.26	18.75	84.38	< 0.001
Income	4 to 6 MW^B	77	60.19	11.35	37.50	90.63
	> 6 MW^{C; A; B}	48	71.29	11.31	53.13	96.88
	18 to 30 years	90	57.75	12.96	18.75	84.38	< 0.001
Age Group	31 to 40 years	53	58.20	10.53	40.63	90.63
	> 40 years	63	67.41	13.33	28.13	96.88
Marital Status	No Companion	139	59.15	13.07	18.75	96.88	0.014
	With Companion	67	64.28	12.85	34.38	96.88	0.014

Instrument/Variable		n	Average	SD	Min	Max	P value
MSHI
Disability Subscale
	1 to 3 MW^A	81	9.53	6.23	0.00	25.00	0.217
Income	4 to 6 MW^B	77	9.18	7.47	0.00	31.00
	> 6 MW^{C; A; B}	48	7.65	6.13	0.00	25.00
	18 to 30 years	90	9.16	6.80	0.00	30.00	0.054
Age Group	31 to 40 years	53	10.6	7.42	0.00	31.00
	> 40 years	63	7.30	5.58	0.00	21.00
Marital Status	No Companion	139	9.45	6.78	0.00	30.00	0.110
	With Companion	67	7.94	6.49	0.00	31.00	0.110
Handicap Subscale
	1 to 3 MW^A	81	6.49	5.08	0.00	20.00	0.03
Income	4 to 6 MW^B	77	6.30	6.27	0.00	27.00
	> 6 MW^{C; A; B}	48	4.79	6.04	0.00	25.00
	18 to 30 years	90	6.48	5.12	0.00	21.00	0.011
Age Group	31 to 40 years	53	6.72	6.45	0.00	27.00
	> 40 years	63	4.79	6.00	0.00	26.00
Marital Status	No Companion	139	6.60	5.94	0.00	27.00	0.019
	With Companion	67	4.82	5.29	0.00	25.00	0.019
Defect Subscale
	1 to 3 MW^A	81	12.37	7.88	0.00	34.00	0.002
Income	4 to 6 MW^B	77	11.35	8.32	0.00	31.00
	> 6 MW^{C; A; B}	48	7.69	6.58	0.00	28.00
	18 to 30 years	90	11.61	7.92	0.00	31.00	0.001
Age Group	31 to 40 years	53	13.11	8.34	0.00	34.00
	> 40 years	63	8.02	6.86	0.00	26.00
Marital Status	No Companion	139	11.43	8.12	0.00	34.00	0.145
	With Companion	67	9.79	7.52	0.00	29.00	0.145
Total
	1 to 3 MW^A	81	28.4	17.71	0.00	70.00	0.023
Income	4 to 6 MW^B	77	26.83	20.27	0.00	79.00
	> 6 MW^{C; A; B}	48	20.13	17.59	0.00	76.00
	18 to 30 years	90	27.24	18.39	1.00	79.00	0.005
Age Group	31 to 40 years	53	30.43	20.59	0.00	76.00
	> 40 years	63	20.11	16.82	0.00	67.00
Marital Status	No Companion	139	27.49	19.23	0.00	79.00	0.071
	With Companion	67	22.55	17.80	0.00	76.00	0.071

	Instrument	MSHI Subscales
		Disability	Handicap	Defect	Total MSHI
	*WHOQOL-Bref domains*
r	Physical	-0.366	-0.394	-0.372	-0.412
p		<0.001	<0.001	<0.001	<0.001
n		206	206	206	206

r	Psychological	-0.359	-0.359	-0.375	-0.407
p		<0.001	<0.001	<0.001	<0.001
n		206	206	206	206

r	Social relationships	-0.236	-0.229	-0.259	-0.276
p		<0.001	<0.001	<0.001	<0.001
n		206	206	206	206

r	Environment	-0.254	-0.319	-0.35	-0.338
p		<0.001	<0.001	<0.001	<0.001
n		206	206	206	206

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[1] Conflict of interests: nothing to declare.