Screening value of V-RQOL in the evaluation of occupational voice disorders
More details
Hide details
Nofer Institute of Occupational Medicine, Łódź, Poland (Audiology and Phoniatrics Clinic)
University of Lodz, Łódź, Poland (Department of Economic and Social Statistics)
Online publication date: 2017-12-28
Corresponding author
Joanna Morawska   

Nofer Institute of Occupational Medicine, Audiology and Phoniatrics Clinic, św. Teresy 8, 91-348 Łódź, Poland
Med Pr 2018;69(2):119–128
Background: Given the growing number of occupational voice users, easy and quick broad-scale screening is necessary to provide prophylaxis of voice disorders. The aim of the study was to assess applicability of the Voice Related Quality of Life questionnaire (V-RQOL) to screening occupational voice disorders. Material and Methods: The research comprised 284 subjects divided into 3 groups: 0 – the control group of normophonic subjects, non-professional voice users (N = 60), 1 – occupational voice users with objectively confirmed voice disorders (N = 124), 2 – the non-randomized group of occupational voice users with and without voice problems (N = 100). Self-assessment of voice was performed by means of the V-RQOL in comparison to the Voice Handicap Index (VHI). The relation between the V-RQOL and VHI was determined by means of linear regression. Receiver Operating Characteristic (ROC) curves were constructed and the cut-off point of the V-RQOL was determined to discriminate between normophonic and dysphonic subjects. Results: The relationship between the VHI and V-RQOL scores indicated a satisfactory coefficient of determination: R2 = 0.7266. High values of Cronbach’s α confirmed high reliability of the V-RQOL test (0.867). Voice-Related Quality of Life questionnaire (V-RQOL) results were significantly worse in the study group than for normophonic controls (p < 0.001). The cut-off point for the test was set at 79 points. The determined area under the curve (AUC) = 0.910 (p < 0.001) showed high diagnostic accuracy of the V-RQOL. Results of the V-RQOL differed for diagnose-based subgroups of dysphonic patients. Conclusions: The study gives grounds for application of the V-RQOL as a reliable tool for screening occupational voice disorders. Med Pr 2018;69(2):119–128