Abstract:
BACKGROUND:Overweight and weight gain throughout adult life have been associated with increased risk of breast cancer after the menopause. However the role of body weight at a young age and of the timing of weight gain over the lifetime in postmenopausal breast cancer is not well documented. METHODS:We conducted a population-based case-control study on breast cancer in France that included 739 cases and 815 population controls in postmenopausal women. Height, weight at age 20, 40 and 50 as well as weight one year before diagnosis were obtained during in-person interviews. RESULTS:No association between body mass index at the age of 20 years and breast cancer after the menopause was detected. However, we found that postmenopausal breast cancer was associated with weight gain between ages 40 and 50 years (OR per 5 kg/m2 increase in BMI: 1.45 [95%ci 1.06-1.98]). The increased risk of breast cancer associated with weight gain was more consistent in leaner women at age 20, in older postmenopausal women (>65 years), and in women who did not use menopausal hormone therapy. CONCLUSIONS:These findings point to the importance of controlling for weight gain in middle aged-women. The role of low body weight in young adulthood in breast cancer risk after the menopause should be further scrutinized.
journal_name
BMC Cancerjournal_title
BMC cancerauthors
Cordina-Duverger E,Truong T,Anger A,Sanchez M,Arveux P,Kerbrat P,Guénel Pdoi
10.1186/s12885-016-2793-0subject
Has Abstractpub_date
2016-09-29 00:00:00pages
761issue
1issn
1471-2407pii
10.1186/s12885-016-2793-0journal_volume
16pub_type
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