Meta-analysis on non-suicidal self-injury among college students in China

Objective To systematically review the epidemiology and distribution characteristics of non-suicidal self-injury (NSSI) among undergraduates in China.Methods PubMed,CNKI,Wanfang and VIP databases was used to collect studies related to NSSI among college students in China from January 1989 to August 2015.Two reviewers screened literature,extracted data and evaluated the risk of bias of included studies,and then meta-analysis was performed by using CMA 2 software.Results A total of 23 studies were included,with 73 677 individuals.The report rate of NSSI was 16.6% [95%CI(10.7%-24.7%)].Subgroup analysis showed that the report rate of NSSI among male college students in China (16.2%) was lower than that of female (17.8%),the difference was statistically significant(P<0.01).Report rate of NSSI among college students in the eastern,central and western regions in China was 21.9%,23.0% and 2.1%,respectively,with statistically significant differences(P<0.01).Sensitivity analysis detected that the quality of the literature had a little effect on the results.Conclusion The detection rate of non-suicidal self-injury among college students in China was higher with significant gender and regional characteristics.