PURPOSE: An association of low plasma HDL-cholesterol with risk of breast cancer has been suggested by multiple studies; the evidence, however, is not conclusive. We examined the possible association of low HDL-cholesterol with incidence of breast cancer using data from the Atherosclerosis Risk in Communities Study (ARIC) cohort, a prospective study of a randomly selected sample of women and men from four U.S. communities. METHODS: Among 7,575 female members of the ARIC cohort, 359 cases of incident breast cancer were ascertained during the follow-up from 1987 through 2000. RESULTS: In analysis adjusted for age, race, body mass index, smoking, and reproductive variables, we observed no association of low baseline HDL-cholesterol (<50mg/dL) with incident breast cancer in the total sample (hazard ratio [HR]=1.08 [95% confidence interval (CI), 0.84-1.40]) and a modest association (HR=1.67 [95% CI, 1.06-2.63]) among women who were premenopausal at baseline. No association was observed among women who were postmenopausal at baseline. Removal from analysis of the first 5 years of follow-up did not appreciably change the observed associations. CONCLUSION: Results of our study suggest that low HDL-cholesterol among premenopausal women may be a marker of increased breast cancer risk.
PURPOSE: An association of low plasma HDL-cholesterol with risk of breast cancer has been suggested by multiple studies; the evidence, however, is not conclusive. We examined the possible association of low HDL-cholesterol with incidence of breast cancer using data from the Atherosclerosis Risk in Communities Study (ARIC) cohort, a prospective study of a randomly selected sample of women and men from four U.S. communities. METHODS: Among 7,575 female members of the ARIC cohort, 359 cases of incident breast cancer were ascertained during the follow-up from 1987 through 2000. RESULTS: In analysis adjusted for age, race, body mass index, smoking, and reproductive variables, we observed no association of low baseline HDL-cholesterol (<50mg/dL) with incident breast cancer in the total sample (hazard ratio [HR]=1.08 [95% confidence interval (CI), 0.84-1.40]) and a modest association (HR=1.67 [95% CI, 1.06-2.63]) among women who were premenopausal at baseline. No association was observed among women who were postmenopausal at baseline. Removal from analysis of the first 5 years of follow-up did not appreciably change the observed associations. CONCLUSION: Results of our study suggest that low HDL-cholesterol among premenopausal women may be a marker of increased breast cancer risk.
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