Comparing the effectiveness of peer-led healthy aging interventions on depression and quality of life in community-dwelling older adults: A systematic review and network meta-analysis.

Background: Healthy aging has become increasingly important owing to the rapidly growing population of older adults globally, and results from the complex interplay of multiple characteristics such as depression and quality of life. Several countries have included peer-led interventions in their health policies to promote healthy aging. Given the growing evidence for these interventions, determining their comparative effectiveness is vital and warranted.

Aim: The aim of this study was to examine the relative effectiveness of peer-led interventions on the depression and quality of life of community-dwelling older adults.

Methods: A systematic review and network meta-analyses were performed. The meta-analysis was performed using random-effects models. Additionally, subgroup, meta-regression, and frequentist network meta-analyses were conducted. The protocol was registered with PROSPERO (CRD 42023492659).

Results: Twelve studies with depression outcomes and 11 studies with quality-of-life outcomes were included. The effect sizes for depression and quality of life were moderate and small, respectively. For depression, face-to-face interactions and intervention duration were moderating factors. For quality of life, intervention provider was a moderating factor. The combined peer-nurse intervention was shown to have a large effect on quality of life, whereas interventions provided by professionals other than nurses or provided only by peers had a small effect. A ranking analysis found that the most effective intervention for increasing quality of life was the simultaneous involvement of both healthcare professionals and peers. The provision of education and exercise interventions showed a higher ranking than goal setting in the leading group.

Linking Evidence To Action: The peer-led interventions were sufficient for depression. The effectiveness for improving quality of life may increase when involving both peers and healthcare professionals, particularly nurses. Nursing and health policymakers could establish distinct strategies depending on whether the goal of peer-led interventions is to improve quality of life or alleviate depression for older adults.