4.06, p < .01) for continuous measures of depressive symptom severity, and 0.81 (95% CI: 0.35-1.27, z = 3.47, p < .01) for anxiety symptom severity. However, the fail-safe Ns for controlled studies for measures of depression and anxiety disorder severity were n = 35 studies (z = 4.31) and n = 11 (z = 3.08) for waitlist controlled and TAU studies, and n = 19 studies (z = 4.21) and n = 42 (z = 5.97) for active treatment controlled studies, respectively. These results suggest that the effect size for anxiety disorder severity for active treatment controlled studies is robust. However, the effect sizes for the controlled studies are unreliable and should be considered preliminary.
