Breast Cancer and Reproductive History From Genealogical Data2

Authors:
  • SHSteven C. Hunt
    Steven C. Hunt
  • RWRoger R. Williams
    Roger R. Williams
  • MSMark H. Skolnick
    Mark H. Skolnick
  • JLJoseph L. Lyon
    Joseph L. Lyon
  • CSCharles R. Smart
    Charles R. Smart
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Abstract
With the use of data from the Utah State Cancer Registry and Utah genealogical data, an analysis of 236 breast cancer patients and 937 controls matched on year of birth showed that a late age at the birth of the first child was most strongly associated with incidence of breast cancer (relative odds = 2.0; PP<0.001). Decreased parity was not significantly associated with breast cancer.