title: An excess of breast cancer among young California-born Asian women.
abstract: OBJECTIVE
  To compare breast cancer risk among young Asian and Pacific Islander (API) women to White women, all of whom were born in California during the 1960s.
  
  
  METHODS
  We used previously-collected data from a population-based case-control study in which breast cancer cases were linked to their California birth records.
  
  
  METHODS
  California, US.
  
  
  METHODS
  Invasive breast cancer cases diagnosed 1988-2004 among women aged < 45 were identified from the population-based California Cancer Registry. Breast cancer cases (n = 3,799) were linked to their California birth records. Controls (n = 17,461) were randomly selected from California birth records for females, frequency matched to cases by birth year.
  
  
  METHODS
  Odds ratios (ORs) and 95% confidence intervals (95% CI) were estimated using logistic regression.
  
  
  RESULTS
  Among young women born in California, API women had higher risks of breast cancer than Whites (OR = 1.62, 95% CI: 1.35-1.94). Among APIs, the risks were highest for women of Filipina (OR = 1.72, 95% Cl: 1.15-2.56) and Japanese ancestry (OR = 1.59, 95% Cl 1.20-2.10).
  
  
  CONCLUSIONS
  Our finding of breast cancer risk among young API women who were born in California that exceeds that of young White women highlights the need for further evaluations of breast cancer risk among young API women and underscores the need to consider both ancestry and migration status in such evaluations.
authors: Cancer Prevention Institute of California, Berkeley, USA.
authors: Peggy
authors: P
authors: Reynolds
authors: Susan
authors: S
authors: Hurley
authors: Debbie
authors: D
authors: Goldberg
authors: Thu
authors: T
authors: Quach
authors: Rudy
authors: R
authors: Rull
authors: Julie
authors: J
authors: Von Behren
mesh_terms: D000328:Adult; D001213:Asian / Q000706:statistics & numerical data*; D001943:Breast Neoplasms / Q000208:ethnology* / Q000473:pathology; D002140:California / Q000453:epidemiology; D016022:Case-Control Studies; D005260:Female; D054624:Health Status Disparities; D006801:Humans; D008875:Middle Aged; D044468:Native Hawaiian or Pacific Islander / Q000706:statistics & numerical data*; D012111:Residence Characteristics; D044465:White People / Q000706:statistics & numerical data*