Abstract
This article aimed to assess the temporal trend of work-related mental and behavioral disorders in Brazil, as well as to measure the effect of changes in the implementation of the Social Security Technical Nexus (NTP, acronym in Portuguese) on the incidence of these disorders among beneficiaries of the General Social Security System (RGPS, acronym in Portuguese). It is an analysis of time series and interrupted time series with data from the Brazilian Ministry of Social Security information system on cases of work-related mental and behavioral disorders from 2003 to 2019. The Prais-Winsten method was employed to calculate the annual percent change (APC) of the incidence rates for the conditions under study. The average incidence of work-related mental and behavioral disorders was 35.48 per 100,000 RGPS links during the period 2003-2019, with an increasing trend (APC = 9.67%; p = 0.033) for Brazil. Before the implementation of changes in the NTP (2003-2007), this value was 15.59, with an increasing trend (APC = 29.28%; p < 0.001), and it more than doubled (43.77) after the RGPS modified the way of establishing the nexus between illness and work (2008-2019). The post-NTP trend for work-related mental and behavioral disorders was a decrease in the country (APC = -23.73%; p < 0.001), a pattern that was repeated for all regions of the country. The findings suggest that the changes in the way of establishing the NTP between illness and work represented an advancement in the system of recording and notifying work-related mental and behavioral disorders in Brazil.