Table 1.

Characteristics at blood draw of 740 postmenopausal women in the Nurses' Health Study

Mean (SD) or %
Age (y)61.5 (4.7)
BMI (kg/m2)26.2 (4.8)
Physical activity (METS/wk)15.7 (19.3)
Parous, %95.0
Parity (among parous women)3.6 (1.7)
AFB in years (among parous women)25.8 (3.5)
Age at natural menopause (y)50.5 (3.2)
Past postmenopausal hormone (PMH) use, %31.2
Duration of PMH use among past users (mo)35.5 (44.4)
Alcohol intake (g/d)5.4 (10.3)
Current smoker, %13.1
Regular aspirin use,*%31.2
Regular use of nonaspirin NSAIDs*, %19.1
Regular acetaminophen use*, %17.3
Median (10th-90th percentile)
Estradiol, pg/mL7 (4-14)
Free estradiol, pg/mL0.10 (0.04-0.25)
Estrone, pg/mL25 (14-43)
Estrone sulfate, pg/mL197 (86-522)
Testosterone, ng/dL22 (12-39)
Free testosterone, ng/dL0.21 (0.09-0.44)
Androstenedione, ng/dL57 (29-109)
Ratio of estrone/androstenedione0.43 (0.22-0.78)
Ratio of estradiol/testosterone0.31 (0.16-0.61)
  • *Use more than once per week in 1990.