TY - JOUR
T1 - Adiposity, adult weight change and breast cancer risk in postmenopausal Japanese women
T2 - The miyagi cohort study
AU - Kawai, M.
AU - Minami, Y.
AU - Kuriyama, S.
AU - Kakizaki, M.
AU - Kakugawa, Y.
AU - Nishino, Y.
AU - Ishida, T.
AU - Fukao, A.
AU - Tsuji, I.
AU - Ohuchi, N.
PY - 2010/10/26
Y1 - 2010/10/26
N2 - Background: The role of adult weight change in breast cancer (BC) risk is unclear in Japanese women. Methods: A total of 10 106 postmenopausal women aged 40-64 years (the Miyagi Cohort) were followed from 1990 to 2003, and 108 BC cases were identified. Hazard ratios (HRs) were estimated according to body mass index (BMI) at the current age and at the of age 20 years, and weight change since age 20 years. Results: Higher current BMI was associated with an increased risk of BC (P for trend=0.02), whereas higher BMI at the age 20 years was inversely associated with this risk (P for trend=0.002). There was a significant association between weight change since age 20 years and BC risk (P for trend=0.0086). Compared with stable weight, HR was 0.35 for weight loss of 5 kg or more (P for weight loss trend=0.04) and 1.55 for weight gain of 12 kg or more (P for weight gain trend=0.05). Conclusion: Adiposity at younger and current age has differential effects on BC risk among postmenopausal women; weight gain in adulthood being associated with an increased, and weight loss with a decreased risk.
AB - Background: The role of adult weight change in breast cancer (BC) risk is unclear in Japanese women. Methods: A total of 10 106 postmenopausal women aged 40-64 years (the Miyagi Cohort) were followed from 1990 to 2003, and 108 BC cases were identified. Hazard ratios (HRs) were estimated according to body mass index (BMI) at the current age and at the of age 20 years, and weight change since age 20 years. Results: Higher current BMI was associated with an increased risk of BC (P for trend=0.02), whereas higher BMI at the age 20 years was inversely associated with this risk (P for trend=0.002). There was a significant association between weight change since age 20 years and BC risk (P for trend=0.0086). Compared with stable weight, HR was 0.35 for weight loss of 5 kg or more (P for weight loss trend=0.04) and 1.55 for weight gain of 12 kg or more (P for weight gain trend=0.05). Conclusion: Adiposity at younger and current age has differential effects on BC risk among postmenopausal women; weight gain in adulthood being associated with an increased, and weight loss with a decreased risk.
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U2 - 10.1038/sj.bjc.6605885
DO - 10.1038/sj.bjc.6605885
M3 - Article
C2 - 20842123
AN - SCOPUS:78049251816
VL - 103
SP - 1443
EP - 1447
JO - British Journal of Cancer
JF - British Journal of Cancer
SN - 0007-0920
IS - 9
ER -