• Sylvie Lambert, BrahimLydia OuldLOIngram School of Nursing, McGill University, Montreal, QC, Canada., Jane McCusker, Chelsea Coumoundouros, Li-Anne Audet, Mark Yaffe, John Kayser, Mona Magalhaes, Eric Belzile, and Nerida Turner.
• Ingram School of Nursing, McGill University, Montreal, QC, Canada. esylvie.lambert@mcgill.ca.
• J Gen Intern Med. 2021 Oct 1; 36 (10): 3159-3178.

BackgroundCaregivers experiencing depression or caring for people experiencing depression are at risk of high burden. This systematic review examined the effect of non-pharmacological interventions for caregivers that (a) target improving caregivers' depressive symptoms, (b) help caregivers manage the depressive symptoms of the person for whom they provide care, or (c) both (a) and (b).MethodsEligible trials published between January 1, 1985, and May 30, 2019 were retrieved from five electronic databases. The studies' methodological quality was assessed against 15 criteria. Pooled effect sizes (ESs) were calculated, and heterogeneity assessed using the Higgin's I2 statistic. Meta-regressions were also conducted to identify significant moderators (participant sub-group analyses) and mediators (identify how the interventions worked).ResultsSixteen studies evaluating 18 interventions were included for review. These studies included a total of 2178 participants (mean = 94, SD = 129.18, range 25-518). The most common condition (n = 10/16) of the care recipient was dementia. The average methodological score was in the moderate range (8.76/15). Interventions had a moderate effect on caregivers' depression in the short term (ES = - 0.62, 95% CI - 0.81, - 0.44), but the effect dissipated over time (ES = - 0.19; 95% CI - 0.29, - 0.09). A similar pattern was noted for anxiety. The moderator analysis was not significant, and of the mediators examined, significant ones were self-management skills of taking action, problem solving, and decision-making.DiscussionNon-pharmacological interventions are associated with improvement of depression and anxiety in caregivers, particularly in the short term. The main recommendation for future interventions is to include the self-management skills taking action, problem-solving, and decision-making. Enhancing the effect of these interventions will need to be the focus of future studies, particularly examining the impact of booster sessions. More research is needed on non-dementia caregiving and dyadic approaches.© 2021. Society of General Internal Medicine.

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