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South African Journal of Communication Disorders

versión On-line ISSN 2225-4765
versión impresa ISSN 0379-8046


NAKHOODA, Faatima; SARTORIUS, Benn  y  GOVENDER, Samantha M.. The effects of combined exposure of solvents and noise on auditory function - A systematic review and meta-analysis. S. Afr. J. Commun. Disord. [online]. 2019, vol.66, n.1, pp.1-11. ISSN 2225-4765.

BACKGROUND: Chemical substances can negatively affect the auditory system. Chemical substances alone or combined with high-level noise have recently become a major concern as a cause of occupational hearing loss. OBJECTIVE: To assess the combined effect of solvents and noise versus solvents only, or noise only, on the auditory function of workers METHOD: Published articles which included noise and/or solvent exposure or combined effects of solvents and noise, studies conducted on human beings only and the use of audiological tests on participants. RESULTS: Thirteen papers were eligible for inclusion. The participants' ages ranged from 18 to 68 years. Results revealed that 24.5% presented with hearing loss as a result of noise exposure only; 18% presented with hearing loss owing to solvent exposure only; and a total of 43.3% presented with hearing loss owing to combined noise and solvent exposure. Furthermore, the prevalence of hearing loss in the noise and solvent group was significantly (p < 0.001) higher than the other groups in 10 out of the 13 studies analysed, with a pooled odds ratio (OR) of 2.754. Of the 178 participants (total of all participants exposed to solvents), a total of 32 participants presented with auditory pathology as a result of exposure to solvents only. There was a significantly higher pooled odds of hearing loss in noise and solvent-exposed group compared to solvent-only group (pooled OR = 2.15, 95% CI: 1.24-3.72, p = 0.006. CONCLUSION: The findings revealed significantly higher odds of acquiring hearing loss when workers were exposed to a combination of solvents and noise as opposed to solvents only, motivating for its inclusion into hearing conservation programmes.

Palabras clave : Solvents; solvent induced hearing Loss; SIHL; ototoxicity; noise Induced hearing loss.

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