Demographic characteristics and prevalence of risk behaviors of the study population.

Note: NSSI = Non-suicide self-injury;aMinor NSSI included hitting self, pulling hair, biting self, inserting objects under nails or skin, picking at a wound, and picking areas to draw blood.bModerate/severe NSSI included cutting/carving, burning, self-tattooing, scraping, and erasing skin.注：NSSI即非自杀性自伤（Non-suicide self-injury）；a. 轻度非自杀性自伤包含击打自身、拉扯毛发、啃咬自身、将异物插入指甲下或皮肤内、抠抓伤口以及抠挠皮肤以引发出血。b. 中重度非自杀性自伤包含切割/刻划皮肤、烧灼皮肤、自行纹身、刮擦皮肤以及擦除皮肤。