Document Detail

Determinants of infant feeding method in relation to risk factors for breast cancer.
MedLine Citation:
PMID:  10845745     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Breastfeeding is considered to be an important factor for maternal and children's health. However, the epidemiological findings related to the effect of breastfeeding on women's health, especially with respect to breast cancer development, are inconsistent. Determinants of infant feeding method may contribute to the inconsistency. METHODS: A total of 24,769 women aged 40-64 in Miyagi Prefecture, Japan, responded to a self-administered questionnaire survey in 1990. Using the data obtained from 22,085 parous women, we calculated odds ratios (ORs) for the choice of "breastfeeding only" during reproductive period. RESULTS: Late age at menarche (> or = 16 years, OR = 1.57) and high body mass index (BMI) at 20 years of age (> or = 24, OR = 1.31) were associated with the choice of breastfeeding only. Late age at birth of first child (> or = 28 years, OR = 0.29), history of breast cancer in mother (OR = 0.68), and high educational level (more than a high school education, OR = 0.53) reduced the possibility of choosing breastfeeding only. CONCLUSION: The results indicate that the choice of infant feeding method is associated with several breast cancer risk factors. Based on this finding, we should construct appropriate breast cancer risk models for parous women and investigate the changes in the effects of breastfeeding and other breast cancer risk factors among these risk models. Especially in a risk model controlling for breastfeeding, the effects of other breast cancer risk factors should be reevaluated. Through comparisons among different risk models, we may find the best-fitted risk model and identify the true effect of breastfeeding.
Y Minami; N Ohuchi; A Fukao; S Hisamichi
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Preventive medicine     Volume:  30     ISSN:  0091-7435     ISO Abbreviation:  Prev Med     Publication Date:  2000 May 
Date Detail:
Created Date:  2000-07-06     Completed Date:  2000-07-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0322116     Medline TA:  Prev Med     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  363-70     Citation Subset:  IM    
Division of Epidemiology, Miyagi Cancer Center Research Institute, Natori, Medeshima-Shiode, Japan.
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MeSH Terms
Body Mass Index
Breast Feeding* / adverse effects
Breast Neoplasms / epidemiology*,  genetics
Educational Status
Infant Food
Japan / epidemiology
Logistic Models
Middle Aged
Risk Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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