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Table 9 Baseline piecewise constant hazard estimates for postmenopausal ER+ tumors and ER- tumors in the women from the EPIC and the WHI studiesa

From: Risk prediction for estrogen receptor-specific breast cancers in two large prospective cohorts

  Age groups, years
40.0–44.9 45.0–49.9 50.0–54.9 55.0–59.9 60.0–64.9 65.0–69.9 70.0–74.9 ≥ 75.0
EPIC study
 ER+ 30 88 152 189 227 239 233 186
 ER− 19 35 44 43 42 41 40 31
WHI study
 ER+ 126 173 185 237 243 270
 ER− 48 50 43 50 39 50
  1. Hazards are presented as number of tumors per 105 person-years
  2. EPIC European Prospective Investigation into Cancer and Nutrition, WHI Women’s Health Initiative, ER estrogen receptor
  3. aRisk factor profiles for baseline hazard: country = France (only for EPIC), menopausal status = 1 (postmenopausal), age at menopause ≤ 45 years, duration of breastfeeding = 0, age at menarche ≤ 11 years, duration of hormone replacement therapy = 0, full-term pregnancy = 0 (nulliparous), body mass index < 25 kg/m2, height_d10 (body height in cm divided by 10) = 16, alcohol intake (drinks/day) = 0