Associations between stressful life events, non-suicidal self-injury, and depressive symptoms among Chinese rural-to-urban children: A three-wave longitudinal study.

Migrant children experience more stressful life events than their urban counterparts. Despite the growing evidence that stressful life events are associated with non-suicidal self-injury (NSSI), few studies have investigated this relationship using longitudinal designs. Besides, potential mediating factors have been rarely examined. This study tested the temporal relationship between stressful life events and NSSI among Chinese rural-to-urban migrant children, with depressive symptoms as the potential mediator, as well as the potential sex differences in these associations. In the present study, 279 Chinese rural-to-urban migrant children (57.3% females; Mage = 11.95, SD = 1.22) reported their stressful life events, depressive symptoms and NSSI a total of three times at 6-month intervals. Depressive symptoms only longitudinally mediated the relationship between stressful life events and NSSI among females. These findings provide evidence that supports the longitudinal effect of stressful life events on NSSI and the mediating role of depressive symptoms among migrant children. Moreover, there are sex differences in these longitudinal relationships.