Maternal criticism and non-suicidal self-injury in school-aged children

•NSSI is a significant concern in youth, and contributing factors are unclear.•Maternal criticism may be critically involved in children's engagement in NSSI.•We found children's sex moderates the link between child NSSI and maternal criticism.•Girls, but not boys, exposed to criticism were more likely to have an NSSI history.•Maternal criticism may be a stronger risk factor for NSSI in girls than boys. Although non-suicidal self-injury (NSSI) is a significant public health concern in youth, most of the extant research on NSSI has focused on adults and, to a lesser extent, adolescents. Therefore, little is known about the correlates and potential risk factors for NSSI in school-aged children. One factor that may be particularly important to children is their exposure to maternal criticism. Thus, the goal of this study was to examine the association between maternal expressed emotion-criticism (EE-Criticism) and NSSI in children, and to determine whether this relation is similar for girls and boys. Participants were 204 children (ages 7–11; 39.7% female, 81.9% Caucasian) and their mothers. Participants completed interviews assessing the child's history of NSSI. Mothers completed the Five-Minute Speech Sample to determine levels of EE-Criticism toward their child. We found that girls exposed to high levels of EE-Criticism were more likely to have a lifetime history of NSSI than girls of mothers exhibiting low levels of EE-Criticism; however, the relation between EE-Criticism and NSSI was not significant for boys. These results are consistent with interpersonal models of risk for NSSI, but suggest that one interpersonal factor, maternal criticism, is more strongly related to NSSI in girls than in boys.