“…Forty-eight percent of the studies (14/29) 6,8,9,14,18,19,22,23,24,25,28,29,30,31 used a retrospective approach, i.e., the presence of ADEs was analyzed after the patient was discharged; 48.3% of the studies (14/29) 7,11,12,13,15,16,17,20,21,26,27,32,33,34 used a prospective approach, whereby the ADEs were identified during the hospital stay; and one study 10 was cross-sectional, where ADEs were identified using a survey. Among the studies with a prospective approach, two used retrospective strategies to complement the evaluation, based on an analysis of hospital discharge forms 16,21 .…”