Table 5.

BMI and incidence of ER-positive and ER-negative invasive breast cancer

ER-positive cancerER-negative cancer
BMINNo. of eventsHR (95% CI)NNo. of eventsHR (95% CI)
STAR/P-1 postmenopausala<25.07,8831341.007,883481.00
25.0–29.98,6411671.14 (0.91–1.43)8,641531.00 (0.68–1.48)
≥30.08,6331711.23 (0.98–1.55)8,633531.03 (0.70–1.52)
Ptrend0.070.88
P-1 premenopausalb<25.02,596271.002,596111.00
25.0–29.91,785251.41 (0.82–2.43)1,785182.52 (1.19–5.33)
≥30.01,483251.78 (1.03–3.07)1,483101.79 (0.76–4.22)
Ptrend0.040.12
  • aAdjusted for treatment, Gail score, and age.

  • bAdjusted for treatment and Gail score.