The objective of this study was to analyze whether the experience of violence by teachers in the school environment increases the risk of teachers suffering violence again within a 2-year period. This longitudinal study included 430 primary and secondary public school teachers from a city in the south of Brazil, with data collected at two time points: T1 (2012-2013) and T2 (2014-2015). The data were obtained via face-to-face interviews and the completion of a questionnaire. The forms of violence investigated included reports of insults from students, humiliation or embarrassment by colleagues or superiors, and threats and physical violence from any member of the school occurring in the 12 months prior to the study. McNemar's test and the Poisson regression with robust error variance were used in the analyses, and the relative risk (RR) and 95% confidence interval (95% CI) were calculated. After 2 years, there was a reduction in violence reported by the teachers from 65.4% (T1) to 56.9% (T2) (p = .003). Teachers who suffered a certain form of violence had three times the risk of suffering that type of violence again. Those who reported three or four forms of violence at T1 had an RR of 2.23 of suffering any form of violence at T2 (95% CI [1.70, 2.93]) compared with those who did not report violence at T1. Psychological violence at T1 was not associated with physical violence at T2, nor was physical violence at T1 associated with psychological violence at T2. Despite the reduction in violence against teachers reported at T2, some forms of violence remained stable after 2 years. Suffering more forms of violence increases the risk of suffering any future violence.
Keywords: cohort studies; longitudinal studies; teachers; violence at work; work; workplace violence.