Effects of bereavement groups–a systematic review and meta-analysis

= 1519) meeting the inclusion criteria (i.e., randomized-controlled trials, bereaved adults, bereavement group, validated measures). Overall, bereavement groups were marginally more effective than control groups post-treatment (gG = 0.33, gD = 0.22) but not at follow-up. Although tertiary interventions yielded larger effect sizes than secondary interventions, the difference was not significant. The results imply that the evidence for bereavement groups is weak, although the large heterogeneity of concepts for intervention and control groups limits the generalizability.