The Efficacy and Effectiveness of Online CBT - Jeroen Ruwaard

7.1. Key Findings 129Work−related stressWork−related stressDepressionPanic symptomsBulimic symptomsDepressionPanic symptomsBulimic symptomsStudy ReferenceStudy ReferenceSummarySummary−0.5 0.0 0.5 1.0 1.5 2.00.40 1.00 2.51 6.31 15.85 39.81pooled d = 0.77 (95% CI = 0.55 to 0.98)pooled Odds Ratio is 4.1 (95% CI = 2.4 − 7.0)(a) Cohen’s d(b) Odds RatioFigure 7.1: Forest plots of between-group effect sizes in the controlled trials of Interapy online CBT for work-related stress, depression,panic symptoms and bulimic symptoms, with regard to a) the standardised difference (Cohen’s d) between the experimental groups inprimary symptom severity improvements, and b) the relative odds (odds ratio) of reliable recovery. Cohen’s d is considered small when d= .2, medium when d = .5 and large when d = .8. Likewise, the odds ratio is small when OR = 1.5, medium when OR = 3.5 and largewhen OR = 9.0