Page 41 - The efficacy and effectiveness of psychological treatments for eating disorders - Elske van den Berg

Chapter 2 41
Quality of life
Nine comparisons were included in the meta-analysis of the effect of psychologi- cal treatment on QoL and no significant differences were found on QoL, g = 0.11, 95% CI [-0.36, 0.15]. Including all ten comparisons led to a high heterogeneity, I2 = 71, 95% CI [46, 85], so one outlier was removed, lowering heterogeneity to I2 = 48, 95% CI [0, 76] (Table 3). No indication for publication bias was found.
Sensitivity analyses including only the largest or smallest effect size of each study, including only high-quality studies, or including only outpatient studies did not result in significant differences between treatment and control condition. Neither when the effects were examined for the Clinical Impairment Assessment separately.
Subgroup analysis showed that the effect of high-quality studies on Qol was signif- icantly different, g = 0.10, 95% CI [-0.17, 0.38], compared with lower quality studies, g = -0.35, 95% CI [-0.70, 0.01], p = .041. Furthermore, a significant difference on QoL was found between studies in which therapist training was reported, g = 0.10, 95% CI [-0.17, 0.38], compared with studies in which training was not reported, g = -0.35, 95% CI [-0.70, 0.01], p = .042.
Meta-regression showed that publication year was not significantly associated with the effects on QoL, b = 0.009, 95% CI [-0.02, 0.04], p = .534.