American Journal of Epidemiology Vol. 124, No. 2: 262-267
Copyright © 1986 by The Johns Hopkins University School of Hygiene and Public Health
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REPRODUCTIVE HISTORY AND POSTMENOPAUSAL RISK OF HIP AND FOREARM FRACTURE
1 Department of Preventive Medicine and Biometrics, University of Colorado Health Sciences Center 4200 East Ninth Avenue, Campus Box C245, Denver, CO 80262
2 Department of Epidemiology, University of Washington Seattle, WA
3 Program in Epidemiology and Biostatistics, Fred Hutchinson Cancer Research Center Seattle WA
Reprint requests to Dr. Beth W. Alderman
This case-control study was designed to investigate the relation between reproductive history and occurrence of hip and forearm fractures in postrmenopausal women. Three hundred and fifty-five King County, Washington women who sustained a fracture between 1976 and 1980 and 562 control women were interviewed regarding their reproductive history and other factors. After control ling for the confounding effects of age, obesity, and use of noncontraceptive estrogens, the authors found that women who gave birth four or more times had a risk of fracture similar to women who had not given birth (odds ratio=1.2, 95% confidence interval=0.72.2), and women who breastfed for more than two years had a risk of fracture similar to women who had never breastfed (odds ratio=0.8, 95%. confidence interval=0.41.5).
forearm injuries; fractures; hip fractures; lactation; parity; osteoporosis
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