Cancer Causes & Control

, Volume 13, Issue 5, pp 407–415

Recent diet and breast cancer risk: the California Teachers Study (USA)


  • Pamela L. Horn-Ross
    • Northern California Cancer Center
  • K.J. Hoggatt
    • Northern California Cancer Center
  • Dee W. West
    • Northern California Cancer Center
  • Melissa R. Krone
    • Northern California Cancer Center
  • Susan L. Stewart
    • Northern California Cancer Center
  • Hoda Anton-Culver
    • School of MedicineUniversity of California
  • Leslie Bernstein
    • Keck School of MedicineUniversity Southern California
  • Dennis Deapen
    • Keck School of MedicineUniversity Southern California
  • David Peel
    • School of MedicineUniversity of California
  • Richard Pinder
    • Keck School of MedicineUniversity Southern California
  • Peggy Reynolds
    • Environmental Health Investigations BranchCalifornia Department of Health Services
  • Ronald K. Ross
    • School of MedicineUniversity of California
  • William Wright
    • Cancer Surveillance SectionCalifornia Department of Health Services
  • Al Ziogas
    • School of MedicineUniversity of California

DOI: 10.1023/A:1015786030864

Cite this article as:
Horn-Ross, P.L., Hoggatt, K., West, D.W. et al. Cancer Causes Control (2002) 13: 407. doi:10.1023/A:1015786030864


Objective: The impact, if any, on breast cancer risk of modifying adult dietary intake is an area of much interest. We take the opportunity to address the relationship between recent adult diet and breast cancer risk during the first two years of follow-up of the large California Teachers Study cohort. Methods: Of the 111,526 at-risk cohort members who resided in California and completed a baseline dietary assessment, 711 were diagnosed with invasive breast cancer after joining the cohort and before January 1998. Average daily nutrient intake was computed based on a food-frequency questionnaire assessing usual dietary intake and portion size during the year prior to joining the cohort. Incident breast cancers were identified through the California Cancer Registry and follow-up for death and confirmation of continued California residence utilized a variety of data sources. Cox proportional hazards models were used to calculate relative hazards. Results: The following components of recent dietary intake were not associated with breast cancer risk: energy, fat, fiber, antioxidant vitamins, and phytoestrogens. Only recent average alcohol consumption of 20 or more grams per day (approximately two or more glasses of wine) was associated with increased risk (RR = 1.5, 95% CI: 1.2–2.0 compared to non-drinkers; ptrend = 0.01 across quintiles). Conclusion: With the exception of alcohol consumption, this study provides no evidence that recent macro- or micronutrient composition of adult diet is likely to have a direct effect on breast cancer risk. Some reduction of alcohol consumption among those consuming more than one drink per day may be beneficial.

alcoholantioxidantsbreast cancerdietfatphytoestrogens
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© Kluwer Academic Publishers 2002