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a Division of Rehabilitation Sciences, School of Allied Health Sciences, University of Texas Medical Branch at Galveston
b Sealy Center on Aging, University of Texas Medical Branch at Galveston
c Division of Geriatrics, Department of Medicine, University of Texas Medical Branch at Galveston
d Department of Preventive Medicine and Community Health, University of Texas Medical Branch at Galveston
Kenneth J. Ottenbacher, UTMB, 301 University Blvd., Route 1137, Galveston, TX 77555-1137 E-mail: Kottenba{at}utmb.edu.
Background. Hip fracture in older adults is a significant medical, social, and economic concern to society. Little is known regarding diabetes as a risk factor for hip fracture in the Mexican American population. The objective of this study was to examine diabetes and other potential risk factors for hip fracture in a sample of community-dwelling, older, Mexican American adults.
Methods. The study was a prospective cohort design involving the Hispanic Established Population for the Epidemiologic Study of the Elderly, a longitudinal study involving a weighted probability sample of Mexican American adults (>65 years) living in the southwestern United States. Included in the study were 3050 older Mexican American subjects who were originally interviewed and tested at baseline and then followed with reassessment at 2, 5, and 7 years. Incidence of hip fracture was examined for subjects over 7-year follow-up.
Results. At baseline, 690 subjects were identified with diabetes. One hundred and thirty-four subjects experienced a first-time hip fracture during follow-up. Cox proportional hazard regression revealed an increased hazard ratio for hip fracture in subjects with diabetes compared to those without diabetes (hazard ratio = 1.57, 95% confidence interval [CI95] = 1.03, 2.39, p < .04) when adjusted for age, body mass index, smoking, and previous stroke. The hazard ratio for Mexican Americans taking insulin was 2.84 (CI95 = 1.49, 5.43, p < .002) when adjusted for covariates.
Conclusions. We found diabetes was associated with increased risk for a hip fracture in older Mexican Americans, particularly subjects taking insulin. Diabetes has not previously been considered a risk factor for hip fracture in older adults. The high incidence of type 2 diabetes in the Mexican American population highlights the need for increased research on risk factors in this ethnic group.
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