Pooled effect-size estimates, heterogeneity and publication bias for the clinical studies by sub-group meta-analyses indicated in the row.

A Effect size estimates were medium and significant in studies that measured BDNF in responders subgroup and non-significant in non-responders subgroup. However, there were no statistically significant differences in pooled effect-size estimates between the responders and non-responders subgroups (all P-values > .5).* Statistical significance at P ** Statistical significance at P *** Statistical significance at P Pooled effect-size estimates, heterogeneity and publication bias for the clinical studies by sub-group meta-analyses indicated in the row.