This study performed a meta analysis on 26 studies (N=3,400) published from 2001 to 2015 concerning north Korean refugees in South Korea who have post-traumatic stress disorder (PTSD) and depression. This study examined the statistical significance and effect size of the coefficient for 8 variables (sex, age, sample size, anxiety, acculturation stress, social support, self-esteem, intervention program) which were found to be significantly associated with depression and PTSD. There were no significant differences in these effect sizes by sex, while the effect size was higher among the studies with a larger female sample (more than 200 refugees) than those with a smaller male sample (less than 200 refugees). The largest effect size was found for acculturation stress (=.235), followed by anxiety (=.104), social support (=-.091), and self-esteem (=-.076). The average effect size of the intervention program was insignificant (=.031, 95%, CI:-.120-.078).