Problem Adaptation Therapy (PATH) to Treat Depression in Older Adults With Cognitive Impairment: A Systematic Review of Treatment Effects

Abstract

Objectives: Problem adaptation therapy (PATH) is a relatively new psychotherapy that recognises the importance of simultaneously targeting cognitive impairment and functional disability in the treatment of late-life depression. This is the first systematic review to examine the effectiveness of PATH. Methods: Ageline, Embase, Medline, PsycINFO, Scopus and ProQuest databases were searched from 2010 until 5 April 2024, for studies that evaluated PATH for older people. Where possible, effect sizes (Hedges' g) with 95% confidence intervals and p values were calculated and pooled using a random effects model. The reporting quality of included studies was assessed using Joanna Briggs Institute Critical Appraisal tools and certainty of the evidence behind each result assessed with The Grading of Recommendations Assessment, Development and Evaluation method. Results: Twelve papers, from seven independent studies and a pooled sample of 579 older adults with multiple comorbidities, were included in this review. PATH participants experienced immediate reductions in depression symptom ratings (gw = 0.72, p < 0.01, Nstudies = 5), alongside small improvements in disability (gw = 0.61, p = 0.04, Nstudies = 4) compared to peers that received supportive therapy, brief psychoeducation, or usual care. The overall evidence quality was, however, characterised by bias, inconsistency, and imprecision in effect estimates. Positive participant feedback and low dropout rates (15%–31%) suggested treatment satisfaction, although these data were not routinely provided. Conclusions: PATH may be a viable treatment for older people living with mental and cognitive disorders, however there is a need for more rigorous research incorporating follow-up assessments to consolidate the effectiveness of PATH relative to other treatments. Incorporating measures of treatment fidelity are also critical to interpreting and generalising these data. The protocol for this study was prospectively published on the Open Science Framework (https://osf.io/gx57a).