NDLI: Use of exogenous hormones and the risk of breast cancer: results from self-reported survey data with validity assessment

Content Provider	Springer Nature Link
Author	Heikkinen, Sanna Koskenvuo, Markku Malila, Nea Sarkeala, Tytti Pukkala, Eero Pitkäniemi, Janne
Copyright Year	2015
Abstract	Main aim was to estimate the association between use of exogenous hormones and breast cancer (BC) risk in a large population-based survey, and to assess the representativeness and overall validity of the data.The survey ‘Women’s Health and Use of Hormones’ was conducted in Finland in 2009, including 7,000 BC cases and 20,000 matched population controls. Conditional logistic regression was used to estimate odds ratios and their 95 % confidence interval. For validation, exposure prevalences were compared with population data from Statistics Finland and two large population-based surveys.We found positive associations with BC risk and exclusive use of hormone-releasing intrauterine device (HR IUD) in postmenopausal women (1.48, 95 % CI 1.10–1.99), when compared to never-users of any hormonal contraceptive and considering only prediagnostic use in cases. Regarding use of other hormonal contraceptives (HC), a positive association between long HC use (≥2 years) and BC was observed in both groups, OR being 1.37 (95 % CI 1.12–1.68) for premenopausal and 1.11 (95 % CI 1.03–1.20) for postmenopausal women, when compared to never-users of other HC.Observed association between HR IUD use and risk of BC in postmenopausal women is worrying and deserves further attention. Selection bias seemed not to explain this result. Considering the increasing popularity of HR IUD use in, e.g., USA, impact of possible adverse effects in public health could be significant.
Starting Page	249
Ending Page	258
Page Count	10
File Format	PDF
ISSN	09575243
Journal	Cancer Causes & Control
Volume Number	27
Issue Number	2
e-ISSN	15737225
Language	English
Publisher	Springer International Publishing
Publisher Date	2015-12-14
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hormonal contraceptives Intrauterine device Case–control study Breast cancer Epidemiology Cancer Research Biomedicine general Oncology Public Health Hematology
Content Type	Text
Resource Type	Article
Subject	Cancer Research Oncology

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