Treating depressed primary care patients improves their physical, mental, and social functioning

Area of Science:

• Clinical Psychology
• Psychiatry
• General Medicine

Background:

• Major depressive disorder (MDD) significantly affects primary care patients' functional status.
• Medical comorbidity can influence the functional outcomes in patients with MDD.
• Understanding treatment effects on functioning is crucial for managing MDD in primary care.

Purpose of the Study:

• To assess functional status in primary care patients with MDD.
• To examine the relationship between medical comorbidity and functional status.
• To evaluate the impact of depression-specific treatments on functional status over 8 months.

Main Methods:

• Randomized clinical trial comparing protocol interventions (nortriptyline or interpersonal psychotherapy) with usual care.
• Functional status assessed using the Medical Outcomes Study 36-Item Short Form Health Survey (SF-36) and Global Assessment Scale.
• Medical comorbidity measured by Duke Severity of Illness Checklist; depression severity by Hamilton Rating Scale and Beck Depression Inventory.

Main Results:

• Patients reported significant functional impairments at baseline.
• Medical comorbidity was linked to reduced physical functioning but not psychological functioning.
• Both groups showed functional improvements over 8 months, with protocol treatments yielding greater gains in mental and some physical domains.

Conclusions:

• Primary care patients with MDD experience substantial functional impairments.
• Medical comorbidity has a limited impact on depression severity and long-term functional status.
• Standardized depression treatments offer superior functional improvements compared to usual care.