Depression in heart failure: Can PHQ-9 help?

Area of Science:

• Cardiology
• Psychiatry
• Health Services Research

Background:

• The Patient Health Questionnaire 9 (PHQ-9) is a validated tool for assessing depression.
• Limited data exist on the utility of the PHQ-9 in heart failure (HF) patient populations.
• Depression is a common comorbidity that may impact HF management and outcomes.

Purpose of the Study:

• To evaluate the severity of depression using the PHQ-9 in heart failure (HF) outpatients.
• To determine the association between PHQ-9 scores and healthcare resource utilization (HCRU).
• To assess the relationship between PHQ-9 scores and quality of life (QoL) in HF patients.

Main Methods:

• A prospective cohort study of 308 HF outpatients.
• Depression severity was assessed at baseline using the PHQ-9, with scores categorized as minimal, mild, or moderate-to-severe.
• Associations between PHQ-9 scores, HCRU (admissions, emergency department visits), and QoL were analyzed over a 24-month follow-up period.

Main Results:

• Moderate-to-severe depressive symptoms (PHQ-9 ≥10) were linked to a 70% increase in all-cause admissions and a 2.5-fold increase in HF-related admissions.
• Even mild depressive symptoms (PHQ-9 5-9) were associated with a 57% increase in all-cause admissions and a >2-fold increase in HF-related admissions.
• Higher PHQ-9 scores correlated with progressively worse QoL, although PHQ-9 was not associated with major clinical events or emergency department visits.

Conclusions:

• The PHQ-9 is effective in identifying heart failure patients at higher risk for increased healthcare resource utilization and diminished quality of life.
• Interventions targeting depression symptoms in HF patients may lead to improved clinical outcomes and reduced healthcare burden.
• Further research should explore the impact of antidepressant treatment on HCRU and QoL in this population.