Abstract P146: Depression Predicts Increased Healthcare Utilization and Death Among Community Patients with Heart Failure
Background: The increasing prevalence of heart failure (HF) and high associated costs has spurred investigation of factors related to adverse outcomes in these patients. Reports to date present discrepant evidence regarding the link between depression and HF outcomes, and only scarce data related to healthcare utilization in the form of emergency department (ED) visits are available. Purpose: To evaluate the relationship of depression with healthcare utilization and death among HF patients in the community. Methods: Residents of Olmsted, Dodge, and Fillmore, MN counties with HF were prospectively recruited between October 2007 and December 2010, and completed a 9-item Patient Health Questionnaire (PHQ-9) for depression categorized as: none-minimal (PHQ-9 score 0-4), mild (5-9), or moderate-severe (≥10). Anderson-Gill models were used to determine if depression predicted hospitalizations and ED visits while proportional hazards regression estimated hazard ratios for death. Results: Among 411 HF patients (mean age 73±13, 58% male), 15% had moderate-severe depression, 27% mild, and 58% none-minimal. Over a mean follow-up of 1.5 years, 613 hospitalizations, 786 ED visits, and 75 deaths occurred. The risk of all adverse outcomes increased stepwise with increasing severity of depression (Table). After adjustment for key clinical characteristics, moderate-severe depression was associated with nearly a 2-fold increased risk of hospitalization and ED visits, and almost a 4-fold increased risk of death. These results are independent of coexisting comorbidities. Conclusions: Depression is frequent among HF patients in the community and independently predicts a significant increase in the use of healthcare resources and mortality. Greater attention to the recognition and management of depression in HF may improve clinical outcomes and decrease healthcare utilization and expenditures in these patients. Hazard Ratios (95%CI) for Hospitalizations and All-Cause Mortality by Severity of Depression None-Minimal Mild Moderate-Severe P for trend Hospitalizations Crude 1.00 (ref) 1.23 (0.91-1.66) 2.01 (1.39-2.89) <0.001 Fully-Adjusted * 1.00 (ref) 1.15 (0.86-1.54) 1.93 (1.37-2.71) 0.001 Emergency Department Visits Crude 1.00 (ref) 1.42 (1.03-1.96) 1.99 (1.42-2.79) <0.001 Fully-Adjusted * 1.00 (ref) 1.39 (1.00-1.93) 1.98 (1.40-2.79) <0.001 All-Cause Mortality Crude 1.00 (ref) 1.53 (0.87-2.68) 3.33 (1.95-5.70) <0.001 Fully-Adjusted * 1.00 (ref) 1.55 (0.88-2.74) 3.84 (2.21-6.68) <0.001 * Adjusted for age, sex, and Charlson comorbidity index