Table 1

Selected characteristics of breast cancer cases and controls, NYU Women’s Health Studya

CharacteristicBreast cancer cases (n = 270)Controls (n = 540)Pb
Age at blood donation (yrs)58 (44–68)58 (43–68)0.86
Age at menarche (yrs)12 (9–17)13 (8–17)0.09
Ever pregnant (%)79.883.10.28
Age at first full-term pregnancy (yrs)26 (16–41)25 (16–43)0.04
Breast cancer in first-degree relative (%)21.922.00.95
Prior benign breast condition (%)62.451.20.005
Height (cm)162.4 (150–183)161.6 (145–183)0.10
Weight (kg)69 (47–123)67 (45–141)0.06
Quetelet index (kg/m2)25.9 (17.0–43.5)25.5 (17.0–54.8)0.24
  • a Values represent means (range), unless otherwise specified.

  • b χ2 test for proportions and mixed-effects regression test for continuous variables.