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  • Title: Prior oral contraception and postmenopausal fracture: a Women's Health Initiative observational cohort study.
    Author: Barad D, Kooperberg C, Wactawski-Wende J, Liu J, Hendrix SL, Watts NB.
    Journal: Fertil Steril; 2005 Aug; 84(2):374-83. PubMed ID: 16084878.
    Abstract:
    OBJECTIVE: To test for the possible association of past oral contraceptive (OC) use and incident fracture after menopause. DESIGN: A prospective cohort of 93,725 postmenopausal women. SETTING: Forty Women's Health Initiative (WHI) clinical centers across the United States. PATIENT(S): Ethnically diverse 93,725 volunteer postmenopausal women, 50 to 79 years old. INTERVENTION(S): None. MAIN OUTCOME MEASURE(S): The main outcome was self-reported incident first fracture assessed prospectively by annual questionnaire. RESULT(S): The adjusted relative hazard (HR) for fracture among past OC users was 1.07 (95% CI, 1.01-1.15). Among women without any postmenopausal hormone treatment, past OC use for < or =5 years led to an HR of 1.15 (95% CI, 1.04-1.27) and for past OC use >5 years led to an HR of 1.09 (95% CI, 0.97-1.23) compared with never users. CONCLUSION(S): This study does not support the idea that past OC use protects against later fracture.
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