Diabetes Care 27:421-428, 2004
© 2004 by the American Diabetes Association, Inc.
Epidemiology/Health Services/Psychosocial Research Original Article |
Diabetes, Major Depression, and Functional Disability Among U.S. Adults
Leonard E. Egede, MD, MS
Department of Medicine and Center for Healthcare Research, Medical University of South Carolina, Charleston, South Carolina
Address correspondence and reprint requests to Leonard E. Egede, MD, Medical University of South Carolina, Center for Health Care Research, 135 Cannon Street, Suite 403, P.O. Box 250837, Charleston, SC 29425. E-mail: egedel{at}musc.edu
OBJECTIVEThe goal of this study was to determine prevalence and odds of functional disability in individuals with diabetes and comorbid major depression compared with individuals with either diabetes or major depression alone.
RESEARCH DESIGN AND METHODSData on 30,022 adults aged 18 years from the 1999 National Health Interview Survey (NHIS) were analyzed. Four disease categories were created: no diabetes and no major depression, major depression alone, diabetes alone, and diabetes and comorbid major depression. Prevalence of functional disability was calculated for each disease category. Multiple logistic regression was used to determine the odds and correlates of functional disability by disease category controlling for age, sex, race/ethnicity, education, income, census region, and disability-associated comorbidity. STATA was used for all analyses to account for the complex survey design of NHIS.
RESULTSPrevalence of functional disability by disease category was as follows: no diabetes and no major depression (24.5%); major depression (51.3%); diabetes (58.1%); and diabetes and comorbid major depression (77.8%). With no diabetes and no major depression as reference and after adjusting for relevant covariates, the odds of functional disability was 3.00 (95% CI 2.623.42) for major depression, 2.42 (2.102.79) for diabetes, and 7.15 (4.5311.28) for diabetes and comorbid major depression.
CONCLUSIONSIndividuals with diabetes and comorbid major depression have higher odds of functional disability compared with individuals with either diabetes or major depression alone. Additional studies are needed to establish a causal relationship.
Abbreviations: CIDI-SF, Composite International Diagnostic Interview Short Form DALY, disability-adjusted life-year NHIS, National Health Interview Survey

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Copyright © 2004 by the American Diabetes Association.
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