Predicting engagement in nonsuicidal self-injury (NSSI) over the course of 12 months: the roles of borderline personality disorder pathology and emotional consequences of NSSI

•BPD pathology was related to greater frequency of negative emotions post-NSSI.•Post-NSSI self-conscious emotions predicted NSSI over a 12-month period.•BPD pathology was related to later NSSI through post-NSSI self-conscious emotions.