Effects of mindfulness meditation interventions on depression in older adults: A meta-analysis

Objective We examined the effects of MMIs on depression in older adults and explored the moderating effects of participant, methods, and intervention characteristics. Methods We systematically searched 15 databases through June 2019 without date restrictions using the following search terms: (mindful* OR meditat*) AND depress* AND (older adult* OR elder OR aging OR senior OR geriatric*). Inclusion criteria were primary studies evaluating MMIs with adults >= 65 years old with depression measured as an outcome, a control group, and written in English. Two researchers independently coded each study and compared for discrepancies and consulted a third researcher in cases of disagreement. We used random-effects model to compute effect sizes (ESs) using Hedges'g, a forest plot, andQandI(2)statistics as measures of heterogeneity; we also examined moderator analyses. Results Nineteen studies included 1,076 participants (71.8 +/- 5.2 years old). Overall, MMIs showed significantly improved depression (ES=.65, 95%CI 0.35, 0.94) compared to controls. With regards to moderators, Asians had a greater improvement in depression (1.28) than Europeans (.59) and North Americans (.32). Less than 5 weeks of MMIs showed greater improvement in depression (1.47) than longer periods (.55). MMIs with guided meditation reduced depression (.91) more than MMIs without (.42). Only one quality indicator,a prioripower analysis, showed greater effects on depression (g = 1.0) than no power analysis (g=.35). Conclusion MMIs improved depressive symptoms in older adults. MMIs might be used as adjunctive or alternative to conventional treatment for depressed older adults.