failed to reach significancep = 0.80
The pooled effect sizes for primary insomnia after treatment ( g = −0.96 [95% CI = −1.53, −0.38]; z = 3.26, p = 0.001) and at the follow-up ( g = −1.13 [95% CI = −2.10, −0.16]; z = 2.27, p = 0.02) were significant, but the effect size for comorbid insomnia after treatment failed to reach significance ( g = −0.11 [95% CI = −0.95, 0.73]; z = 0.25, p = 0.80).