The Natural Course and Outcome of Major Depressive Disorder in Primary Care: the PREDICT-NL Study

Overview

Journal Soc Psychiatry Psychiatr Epidemiol

Specialties Psychiatry
Public Health
Social Sciences

Date 2010 Nov 9

PMID 21057769

Citations 43

Authors

Bauke T Stegenga

Marjolein H Kamphuis

Michael King

Irwin Nazareth

Mirjam I Geerlings

Affiliations

Soon will be listed here.

Abstract

Purpose: To examine the natural course and outcome of major depressive disorder (MDD) in primary care over 39 months.

Methods: Prospective cohort study of 1,338 consecutive attendees with follow-up after 6, 12, and 39 months with DSM-IV MDD using the Composite International Diagnostic Interview (CIDI). We measured severity of depressive symptoms (Patient Health Questionnaire 9), somatic symptoms (Patient Health Questionnaire 15), and mental and physical function (Short Form 12, mental and physical component summary). Analysis of variance and random coefficient models were performed.

Results: At baseline, 174 people (13%) had MDD of which 17% had a chronic and 40% had a fluctuating course, while 43% remitted. Patients with chronic courses had more severe depressive symptoms (mean difference 6.54; 95% CI 4.38-8.70), somatic symptoms (mean difference 3.31; 95% CI 1.61-5.02), and greater mental dysfunction (mean difference -10.49; 95% CI -14.42 to -6.57) at baseline than those who remitted from baseline, independent of age, sex, level of education, presence of a chronic disease, and a lifetime history of depression.

Conclusions: Although 43% of patients with MDD attending primary care recover, this leaves a majority of patients (57%) who have a chronic or intermittent course. Chronic courses are associated with higher levels of depressive symptoms and somatic symptoms and greater mental dysfunction at baseline.

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