Temporal trend of self-inflicted injury notifications in adolescents in the school environment, Brazil, 2011-2018

Abstract

Objective: To analyze the trend in notifications of self-harm in adolescents in the school environment in Brazil, from 2011 to 2018. Methods: Ecological time series study, with data from the Notifiable Disease Information System, using the Prais-Winsten linear regression model. Results: A total of 1,989 cases were reported. Notification rates ranged from 0.09 to 2.75/100 thousand inhabitants, with an increasing trend for both females (annual percentage change [VPA]=66.0% – 95% confidence interval [95%CI] 39.0;98.3), as for males (VPA=55.2% – 95%CI 29.9;85.4). The North region showed a stationary trend while the Southeast and South regions showed increasing trend, especially Rio de Janeiro (VPA=85.5% – 95%CI 58.0;117.8) and Paraná (VPA=73.6% – 95%CI 41.9;112.3). In the Midwest region, only Mato Grosso do Sul state showed an increase (VPA=54.5% – 95%CI 16.9;104.2). Conclusion: There was a growing trend in notifications of self-harm in adolescents in the school environment in Brazil in the period.