Factors associated with notification of noise-induced hearing loss in Brazil, 2013-2015: An ecological study

Abstract

Objective: To investigate factors associated with the notification of noise-induced hearing loss (NIHL), on the Notifiable Health Conditions Information System (SINAN) in Brazil. Methods: This was an ecological study to estimate the proportion of municipalities that had notified NIHL. Logistic regression models were used to identify associated factors. Results: Between 2013-2015, 277 (5.0%) municipalities notified NIHL. Notification was more prevalent among municipalities in an Occupational Health Referral Center (CEREST) coverage area (OR=1.62 – 95%CI 1.02;2.59) or those that had a CEREST in their territory (OR=4.37 – 95CI% 2.75;6.93), those that were closer to the state capital (OR=1.43 – 95%CI 1.06;1.92) and those with a high human development index (OR=2.35 – 95%CI 1.16;4.75). Among the municipalities located in a CEREST coverage area, notification was more frequent when there was a speech-language-hearing professional in the team (OR=1.96 – 95%CI – 1.47;2.63) and when employee turnover was low (OR=1.88 – 95%CI 1.40;2.52). Conclusion: Contextual factors influence NIHL notification, particularly the presence of CERESTs and their qualification.