262 Appendices Outcome category Moderator variables Studies (s) Effect sizes (k) Β0 mean d (95% CI) Β1 (95% CI) Omnibus test p value Variance level 2 Variance level 3 Intervention characteristics Type caregiver 14 54 F(1,52) = 0.704 0.405 0.000 0.055*** Informal (RC) 9 23 0.103 (-0.099–0.304) Formal 5 31 -0.027 (-0.264–0.210) -0.130 (-0.441–0.181) Duration 16 59 0.039 (-0.105–0.183) -0.004 (-0.030–0.023) F(1,57) = 0.082 0.775 0.000 0.044*** Study characteristics Type control condition 15 57 F(1,55) = 0.001 0.978 0.000 0.044*** TAU (RC) 13 51 0.037 (-0.108–0.183) TAU+ 3 6 0.033 (-0.266–0.332) -0.004 (-0.326–0.317) Type intervention condition 16 59 F(1,57) = 0.526 0.471 0.000 0.039*** TAU+SNI (RC) 10 29 -0.007 (-0.170–0.155) SNI 6 30 0.087 (-0.117–0.291) 0.095 (-0.166–0.355) Risk of bias 16 59 F(2,56) = 01.019 0.368 0.000 0.043*** High (RC) 7 11 0.135 (-0.094–0.363) Some concerns 6 30 -0.076 (-0.279–0.127) -0.211 (-0.516–0.095) Low 3 18 0.072 (-0.193–0.336) -0.063 (-0.412–0.287) Note: s = number of independent studies. k = number of effect sizes. Β0 mean d = Cohen’s d mean effect size of the corresponding predictor. Β1 = mean effect size difference between reference category and other corresponding categories. CI = confidence interval. Variance level 2 = variance between effect sizes within studies. Variance level 3 = variance between studies. RC = reference category. TAU+SNI = treatment as usual with the addition of a social network intervention. SNI = social network intervention only intervention condition. TAU+ = comparison group consisting of treatment as usual with the addition of another intervention. TAU = treatment as usual only control condition. *p < 0.05. **p < 0.01. ***p < 0.001.
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