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Example sentences for: bbd

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Relative risks (RR) were calculated by comparing the highest and lowest quintiles of nutrient intake (Q 5 versus Q 1 ). Multivariate models included age at diagnosis, family history of breast cancer in mother or sister, diagnosis of benign breast disease (BBD), age at menarche (in quintiles), body mass index at age 18 (in deciles), adult height (in quartiles), reproductive history (categorical), and vitamin A intake (continuous) in 1980 [ 15 ] . Current vitamin A intake was included in the model because we have previously shown in this cohort of women that lower intake of vitamin A is positively associated with an increased risk of breast cancer.
BBD = benign breast disease; CI = confidence interval; FFQ = food-frequency questionnaire; Q = quintile; RR = relative risk.
Breast cancer cases had later age at first birth, lower parity, increased adult height, and higher incidence of BBD, and were more likely than controls to have a family history of breast cancer.