Meta-analyses of studies examining the effect of psychological treatment for depression.

* p < .05; ** p < .01; Italic numbers indicate a non-significant trend (p < .10) a difference between the effect size point estimates of the published studies only and the published + unpublished studies, calculated using 5 decimals. b 1 degree of freedom. NComp = total number of participants in the comparisons conditions; NPT = total number of participants in the PT or PT+antidepressant medication conditions; PT = psychological treatment; Qbetw. = Q between value Meta-analyses of studies examining the effect of psychological treatment for depression.