The Impact of Vocal and Laryngeal Pathologies Among Professional Singers: A Meta-analysis.

Objective: Professional singers are more likely to develop laryngeal pathologies and symptoms associated with misuse and overuse of the voice. However, different studies have shown conflicting evidence. We aim to perform a systematic review and quantitative meta-analysis to determine the prevalence and risk of laryngeal pathologies and symptoms among professional singers.

Methods: Four electronic databases (MEDLINE, PubMed, EMBASE, and CINAHL) were searched, with no language restrictions. From 3368 potential studies, a total of 21 studies met our inclusion criteria. A systematic review of the literature was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guidelines. All cohort, case-control, or cross-sectional studies that reported the risk of laryngeal pathologies in singers were included. Data were pooled by a random effects model and the pooled odds ratios (ORs) and 95% confidence intervals (CIs) were calculated.

Results: There was a positive relationship between singing and laryngeal pathologies. There was an increased risk of hoarseness (OR: 2.00, 95% CI: 1.61-2.49), gastroesophageal reflux disease (GERD) (OR: 1.45, 95% CI: 1.19-1.77), Reinke edema (OR: 2.15, 95% CI: 1.08-4.30), and polyps (OR: 2.10, 95% CI: 1.06-4.14) in professional singers.

Conclusion: Professional singers are at an increased risk of laryngeal pathologies and symptoms associated with vocal misuse and overuse, particularly hoarseness, GERD, edema, and polyps.