Contribution of depression and cardiometabolic diseases and the role of depression treatment in survival and functioning in older adults.

Abstract

Achieving survival free from physical disability or neurocognitive impairment, known as disability-free survival (DFS), is a key public health goal. This study aimed to (1) determine the long-term interactive effects of depression and cardiometabolic diseases (CMDs) on DFS, and (2) explore any associated antidepressant treatment effect on improvements in DFS among older adults. We used data from the ASPREE trial and its observational follow-ups (2010-2019), involving community-dwelling adults aged ≥ 70 years (≥65 for U.S. minorities). Time-updated Cox models were used to estimate the combined effect of depression and CMDs (type 2 diabetes, dyslipidemia, hypertension, chronic kidney disease, metabolic-associated steatotic liver disease, and major adverse cardiovascular events) as well as cardiometabolic multimorbidity (≥2 CMDs) on DFS. To evaluate the improvement in DFS associated with antidepressant treatment in individuals with depression, we estimated the number needed to treat (NNT) to achieve a one-year increase in DFS through antidepressant therapy. 18,739 participants (mean [SD] age, 75.1 [4.6] years; 56.0% female) were included, with a median follow-up of seven years; individuals with both depression and CMDs demonstrated a significantly lower DFS compared to those without either condition. In individuals with depressive symptoms, antidepressant use was associated with a median increase in DFS of 2.95 years (95% CI, 2.12-3.04), with an estimated NNT of 8.05 (95% CI, 5.63-14.86) associated with a one-year increase in DFS. Integrating depression treatment into chronic disease management, when appropriate, is associated with an improvement in DFS among older adults. Deakin University Postgraduate Research Scholarship.