Association between depression and death in people with CKD: a meta-analysis of cohort studies

Depression occurs relatively commonly in people with chronic kidney disease (CKD), but it is uncertain whether depression is a risk factor for premature death in this population. Interventions to reduce mortality in CKD consistently have been ineffective and new strategies are needed.

Systematic review and meta-analysis of cohort studies.

Adults with CKD.

Cohort studies identified in Ovid MEDLINE through week 3 December 2012 without language restriction.

Depression status as determined by physician diagnosis, clinical coding, or self-reported scales.

All-cause and cardiovascular mortality. Outcomes were summarized as relative risks (RRs) with 95% CIs using random-effects meta-analysis.

22 studies (83,381 participants) comprising 12,063 cases of depression (mean prevalence, 27.4%; 95% CI, 20.0%-36.3%) with a follow-up of 3 months to 6.5 years were included. Methodological quality generally was good or fair. Depression consistently increased the risk of death from any cause (RR, 1.59; 95% CI, 1.35-1.87), but had less certain effects on cardiovascular mortality (RR, 1.88; 95% CI, 0.84-4.19). Associations for mortality were similar regardless of the diagnostic method used for depression, but were weaker in analyses controlled for preexisting cardiovascular disease (RR, 1.36; 95% CI, 1.23-1.50).

Meta-analyses adjusting for antidepressant medication use were not possible, and data for kidney transplant recipients and individuals with earlier stages of CKD not treated with dialysis were limited.

Depression is associated with a substantially increased risk of death in people with CKD. Effective treatment for depression in people with CKD may reduce mortality.