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Departments of Psychiatry and Behavioral Sciences and Medicine, University of Washington (P.P.V., J.M.S., J.Z., M.V.S.), Seattle, Washington, and Department of Psychiatry and Behavioral Sciences, Duke University (I.C.S.), Durham, North Carolina.
Address reprint requests to: Peter P. Vitaliano, PhD, University of Washington, Department of Psychiatry and Behavioral Sciences, Box 356560, Seattle, WA 98195-6560. Email: pvital{at}u.washington.edu
OBJECTIVE: We tested a theoretical stress model cross-sectionally and prospectively that examined whether relationships of chronic stress, psychophysiology, and coronary heart disease (CHD) varied in older adult men (N = 47), older adult women not using hormone replacement therapy (HRT) (N = 64), and older adult women using HRT (N = 41).
METHOD: Structural equations examined relationships of CHD with 1) chronic stress (caring for a spouse with Alzheimer’s disease and patient functioning), 2) vulnerability (anger and hostility), 3) social resources (supports), 4) psychological distress (burden, sleep problems, and low uplifts), 5) poor health habits (high-caloric, high-fat diet and limited exercise), and 6) the metabolic syndrome (MS) (blood pressure, obesity, insulin, glucose, and lipids).
RESULTS: Caregiver men had a greater prevalence of CHD (13/24) than did noncaregiver men (6/23) (p < .05) 27 to 30 months after study entry. This was influenced by pathways from caregiving to distress, distress to the MS, and the MS to CHD. In men, poor health habits predicted the MS 15 to 18 months later, and the MS predicted new CHD cases over 27 to 30 months. In women, no "caregiving-CHD" relationship occurred; however, 15 to 18 months after study entry women not using HRT showed "distress-MS" and "MS-CHD" relationships. In women using HRT, associations did not occur among distress, the MS, and CHD, but poor health habits and the MS were related.
CONCLUSIONS: In older men, pathways occurred from chronic stress to distress to the metabolic syndrome, which in turn predicted CHD. Older women not using HRT showed fewer pathways than men; however, over time, distress, the MS, and CHD were related. No psychophysiological pathways occurred in older women using HRT.
Key Words: stress, • coronary disease, • gender, • metabolic syndrome, • hormone replacement, • path analysis.
Abbreviations: AD = Alzheimer’s disease;; BP = blood pressure;; BMI = body mass index;; CHD = coronary heart disease;; CVD = cardiovascular disease;; DBP = diastolic blood pressure;; HDLC = high-density lipoprotein cholesterol;; HRT = hormone replacement therapy;; LV = latent variable;; LVPLS = latent variable partial least square;; MLE = maximum likelihood estimation;; MS = metabolic syndrome;; MV = manifest variable;; PLS = partial least squares;; RMS = root mean square;; SBP = systolic blood pressure;; SES = socioeconomic status;; TG = triglycerides.
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