and that of suicide attempt from 1.65 to 10.50. The source of observed heterogeneity was explored using a meta-regression analysis considering mean age, sex, adjusted/unadjusted effect estimates, and methodological quality of the included studies as covariates. However, none of these covariates had a significant effect on the observed heterogeneity. One reason that may explain this heterogeneity is that individual studies come from different settings with different populations, sample sizes and methodological quality.
