Table 4

Distributions of weight, HRT, and alcohol consumption with associated RRs of breast cancer among women with natural menopause or bilateral oophorectomy

WAANHJAL-USL-NUSRRP
Weight (kg)a
 <57.021.9%7.7%15.4%57.9%15.6%16.6%1.00
 57.1−30.8%18.6%24.4%27.1%27.4%32.2%1.11
 66.1−26.9%31.2%28.1%11.6%30.5%32.4%1.21
 77.0+20.3%42.5%32.1%3.5%26.5%18.8%1.34
 Average68.277.573.256.771.068.30.003b
HRT
 Never35.7%55.1%52.2%39.8%49.3%62.6%1.00
 Past HRT19.4%23.1%18.5%14.3%20.2%19.6%1.05
 Current ERT14.3%11.3%10.9%15.2%12.8%7.4%1.36
 Current EPRT30.6%10.5%18.3%30.7%17.7%10.3%1.86<0.0001c
Alcohol (drinks/day)
 Never40.1%62.0%63.8%77.7%60.3%68.9%1.00
 <137.4%28.5%26.8%18.9%33.6%27.5%1.08
 ≥122.5%9.5%9.3%3.4%6.1%3.6%1.390.002b
  • a Standardized to the age distribution of the cohort of women with natural menopause or bilateral oophorectomy.

  • b Test for linear trend (for this variable) after fitting all seven known risk factors and ethnicity.

  • c Test for heterogeneity after fitting all seven known risk factors and ethnicity.