Mindfulness-based interventions for the treatment of depressive rumination: Systematic review and meta-analysis.

In the subgroup of studies that found weak effects on rumination the reduction in depression scores was at the limit of significance ( k = 6; g = −0.29; 95% CI: −0.58, 0.00; I 2 = 44%), although there was (non-significant) heterogeneity with two studies showing a medium and strong effect, respectively.

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