Post-intervention anxiety/depression outcomes: internet-based intervention vs. waitlist control. Forest plot of standardized mean differences/risk ratio (squares, proportional to weights used in meta-analysis) and associated confidence intervals (lines). Summary measure and 95% confidence interval is presented as a diamond. Panel a: Forest plot of standardized mean differences in anxiety symptom severity score. Panel b: Forest plot of relative risk for anxiety symptom remission. Panel c: Forest plot of standardized mean differences in depression symptom severity score. CI, confidence interval; df, degrees of freedom; Chi2, statistical test for heterogeneity; P, p-value of Chi2 (evidence of heterogeneity of intervention effects); I2, amount of heterogeneity between trials; Z, test for overall effect; Overall effect P, p-value for significance of overall effect.