• Annals of family medicine · Nov 2004

    Depression and comorbid illness in elderly primary care patients: impact on multiple domains of health status and well-being.

    • Polly Hitchcock Noël, John W Williams, Jürgen Unützer, Jason Worchel, Shuko Lee, John Cornell, Wayne Katon, Linda H Harpole, and Enid Hunkeler.
    • VERDICT, an HSR&D Center of Excellence, South Texas Veterans Health Care System, 7400 Merton Minter Blvd (11C6), San Antonio, TX 78229-4404, USA. pollyh@verdict.uthscsa.edu
    • Ann Fam Med. 2004 Nov 1; 2 (6): 555562555-62.

    PurposeOur objective was to examine the relative association of depression severity and chronicity, other comorbid psychiatric conditions, and coexisting medical illnesses with multiple domains of health status among primary care patients with clinical depression.MethodsWe collected cross-sectional data as part of a treatment effectiveness trial that was conducted in 8 diverse health care organizations. Patients aged 60 years and older (N = 1,801) who met diagnostic criteria for major depression or dysthymia participated in a baseline survey. A survey instrument included questions on sociodemographic characteristics, depression severity and chronicity, neuroticism, and the presence of 11 common chronic medical illnesses, as well as questions screening for panic disorder and posttraumatic stress disorder. Measures of 4 general health indicators (physical and mental component scales of the SF-12, Sheehan Disability Index, and global quality of life) were included. We conducted separate mixed-effect regression linear models predicting each of the 4 general health indicators.ResultsDepression severity was significantly associated with all 4 indicators of general health after controlling for sociodemographic differences, other psychological dysfunction, and the presence of 11 chronic medical conditions. Although study participants had an average of 3.8 chronic medical illnesses, depression severity made larger independent contributions to 3 of the 4 general health indicators (mental functional status, disability, and quality of life) than the medical comorbidities.ConclusionsRecognition and treatment of depression has the potential to improve functioning and quality of life in spite of the presence of other medical comorbidities.

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