Breast cancer and oral contraceptive use in Asian-American women.

  title={Breast cancer and oral contraceptive use in Asian-American women.},
  author={Giske A Ursin and Anna H Wu and Robert Nathaniel Hoover and Dee W. West and Abraham M. Y. Nomura and Laurence N. Kolonel and Malcolm C. Pike and Regina G Ziegler},
  journal={American journal of epidemiology},
  volume={150 6},
Breast cancer incidence has historically been 4-7 times higher in the United States than in Asia. A previous study by the authors in Asian-American women demonstrated a substantial increase in breast cancer risk in women who migrated from Asia to the United States, with the risk almost doubling during the first decade after migration. Increased use of oral contraceptives soon after migration to the United States could possibly explain this rapid rise in risk. In a population-based case-control… CONTINUE READING
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