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The association between breastfeeding and breast cancer occurrence among Israeli Jewish women: a case control study.

Abstract

PURPOSE

Breast cancer remains the major malignant disease among Israeli women, with about 4,000 new cases diagnosed annually, and a steadily increasing incidence rates. Early in this century investigators noted that nulliparity and a history of never having breastfed were more common in women with breast cancer than without the disease. Epidemiological evidence on those issues remains controversial. The purpose of this study was to clarify those controversial.

METHODS

A hospital-based case control study was carried out at Nahariya hospital (North of Israel) to assess the risk of breast cancer in relation to breastfeeding history. A total of 256 recent cases of breast cancer (diagnosed between January 1999 and February 2005) and 536 controls were included. Detailed information regarding breastfeeding, menstruation, reproductive factors and confounders was collected. Adjusted odds ratios and 95% confidence intervals were calculated.

RESULTS

Short duration of lifetime breastfeeding, late age at first breastfeeding and experience of insufficient milk were found to increase breast cancer risk. When women who had ever breastfed their infants were compared with females who had not, breastfeeding was found to be protective (OR of 0.39; 95% CI 0.26-0.59).

CONCLUSIONS

These findings may have significant impact on intervention planning aimed towards breast cancer reduction among Israeli Jewish women.

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  • Authors+Show Affiliations

    ,

    Paediatrics Department, Nahariya Hospital, Nahariya, Israel.

    , , ,

    Source

    MeSH

    Adult
    Aged
    Breast Feeding
    Breast Neoplasms
    Case-Control Studies
    Confounding Factors (Epidemiology)
    Female
    Humans
    Israel
    Jews
    Menstruation
    Middle Aged
    Odds Ratio
    Parity
    Pregnancy
    Risk Assessment
    Risk Factors
    Surveys and Questionnaires

    Pub Type(s)

    Journal Article

    Language

    eng

    PubMed ID

    17453241

    Citation

    Shema, Lilach, et al. "The Association Between Breastfeeding and Breast Cancer Occurrence Among Israeli Jewish Women: a Case Control Study." Journal of Cancer Research and Clinical Oncology, vol. 133, no. 8, 2007, pp. 539-46.
    Shema L, Ore L, Ben-Shachar M, et al. The association between breastfeeding and breast cancer occurrence among Israeli Jewish women: a case control study. J Cancer Res Clin Oncol. 2007;133(8):539-46.
    Shema, L., Ore, L., Ben-Shachar, M., Haj, M., & Linn, S. (2007). The association between breastfeeding and breast cancer occurrence among Israeli Jewish women: a case control study. Journal of Cancer Research and Clinical Oncology, 133(8), pp. 539-46.
    Shema L, et al. The Association Between Breastfeeding and Breast Cancer Occurrence Among Israeli Jewish Women: a Case Control Study. J Cancer Res Clin Oncol. 2007;133(8):539-46. PubMed PMID: 17453241.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - The association between breastfeeding and breast cancer occurrence among Israeli Jewish women: a case control study. AU - Shema,Lilach, AU - Ore,Liora, AU - Ben-Shachar,Menachem, AU - Haj,Mahmoud, AU - Linn,Shai, Y1 - 2007/04/24/ PY - 2007/02/04/received PY - 2007/03/23/accepted PY - 2007/4/25/pubmed PY - 2007/11/2/medline PY - 2007/4/25/entrez SP - 539 EP - 46 JF - Journal of cancer research and clinical oncology JO - J. Cancer Res. Clin. Oncol. VL - 133 IS - 8 N2 - PURPOSE: Breast cancer remains the major malignant disease among Israeli women, with about 4,000 new cases diagnosed annually, and a steadily increasing incidence rates. Early in this century investigators noted that nulliparity and a history of never having breastfed were more common in women with breast cancer than without the disease. Epidemiological evidence on those issues remains controversial. The purpose of this study was to clarify those controversial. METHODS: A hospital-based case control study was carried out at Nahariya hospital (North of Israel) to assess the risk of breast cancer in relation to breastfeeding history. A total of 256 recent cases of breast cancer (diagnosed between January 1999 and February 2005) and 536 controls were included. Detailed information regarding breastfeeding, menstruation, reproductive factors and confounders was collected. Adjusted odds ratios and 95% confidence intervals were calculated. RESULTS: Short duration of lifetime breastfeeding, late age at first breastfeeding and experience of insufficient milk were found to increase breast cancer risk. When women who had ever breastfed their infants were compared with females who had not, breastfeeding was found to be protective (OR of 0.39; 95% CI 0.26-0.59). CONCLUSIONS: These findings may have significant impact on intervention planning aimed towards breast cancer reduction among Israeli Jewish women. SN - 0171-5216 UR - https://www.unboundmedicine.com/medline/citation/17453241/The_association_between_breastfeeding_and_breast_cancer_occurrence_among_Israeli_Jewish_women:_a_case_control_study_ L2 - https://dx.doi.org/10.1007/s00432-007-0199-8 DB - PRIME DP - Unbound Medicine ER -