A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Perinatal characteristics and breast cancer risk in daughters – a Scandinavian population-based study
Alaotsikko: a Scandinavian population-based study
Tekijät: Troisi R, Grotmol T, Jacobsen J, Tretli S, Toft-Sorensen H, Gissler M, Kaaja R, Potischman N, Ekbom A, Hoover RN, Stephansson O
Kustantaja: CAMBRIDGE UNIV PRESS
Julkaisuvuosi: 2013
Journal: Journal of Developmental Origins of Health and Disease
Tietokannassa oleva lehden nimi: JOURNAL OF DEVELOPMENTAL ORIGINS OF HEALTH AND DISEASE
Lehden akronyymi: J DEV ORIG HLTH DIS
Numero sarjassa: 1
Vuosikerta: 4
Numero: 1
Aloitussivu: 35
Lopetussivu: 41
Sivujen määrä: 7
ISSN: 2040-1744
DOI: https://doi.org/10.1017/S2040174412000645
Tiivistelmä
The in utero origins of breast cancer are an increasing focus of research. However, the long time period between exposure and disease diagnosis, and the lack of standardized perinatal data collection makes this research challenging. We assessed perinatal factors, as proxies for in utero exposures, and breast cancer risk using pooled, population-based birth and cancer registry data. Birth registries provided information on perinatal exposures. Cases were females born in Norway, Sweden or Denmark who were subsequently diagnosed with primary, invasive breast cancer (n=1419). Ten controls for each case were selected from the birth registries matched on country and birth year (n=14,190). Relative risks (RRs) and 95% confidence intervals (CIs) were estimated using unconditional regression models. Breast cancer risk rose 7% (95% CI 2-13%) with every 500 g (roughly 1 S. D.) increase in birth weight and 7% for every 1 S. D. increase in birth length (95% CI 1-14%). The association with birth length was attenuated after adjustment for birth weight, while the increase in risk with birth weight remained with adjustment for birth length. Ponderal index and small-and large-for-gestational-age status were not better predictors of risk than either weight or length alone. Risk was not associated with maternal education or age, gestational duration, delivery type or birth order, or with several pregnancy complications, including preeclampsia. These data confirm the positive association between birth weight and breast cancer risk. Other pregnancy characteristics, including complications such as preeclampsia, do not appear to be involved in later breast carcinogenesis in young women.
The in utero origins of breast cancer are an increasing focus of research. However, the long time period between exposure and disease diagnosis, and the lack of standardized perinatal data collection makes this research challenging. We assessed perinatal factors, as proxies for in utero exposures, and breast cancer risk using pooled, population-based birth and cancer registry data. Birth registries provided information on perinatal exposures. Cases were females born in Norway, Sweden or Denmark who were subsequently diagnosed with primary, invasive breast cancer (n=1419). Ten controls for each case were selected from the birth registries matched on country and birth year (n=14,190). Relative risks (RRs) and 95% confidence intervals (CIs) were estimated using unconditional regression models. Breast cancer risk rose 7% (95% CI 2-13%) with every 500 g (roughly 1 S. D.) increase in birth weight and 7% for every 1 S. D. increase in birth length (95% CI 1-14%). The association with birth length was attenuated after adjustment for birth weight, while the increase in risk with birth weight remained with adjustment for birth length. Ponderal index and small-and large-for-gestational-age status were not better predictors of risk than either weight or length alone. Risk was not associated with maternal education or age, gestational duration, delivery type or birth order, or with several pregnancy complications, including preeclampsia. These data confirm the positive association between birth weight and breast cancer risk. Other pregnancy characteristics, including complications such as preeclampsia, do not appear to be involved in later breast carcinogenesis in young women.
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