Table 3

ICCs and 95% CIs for plasma estrogens and urinary estrogen metabolites based on two blood samples from all of the premenopausal women and from a subset of women with progesterone levels ≥300 ng/dl

HormoneNo. of pairsICC95% CI
Follicular plasma
 All of the women
  Estradiol (pg/ml)850.53(0.37 –0.67)
  Estrone (pg/ml)830.52(0.36 –0.67)
  Estrone sulfate (pg/ml)330.67(0.36 –0.88)
Luteal plasma
 All of the women
  Estradiol (pg/ml)850.19(0.06 –0.47)
  Estrone (pg/ml)850.54(0.38 –0.68)
  Estrone sulfate (pg/ml)280.52(0.18 –0.84)
  Progesterone (ng/dl)850.54(0.39 –0.69)
 Women with progesterone levels ≥300 ng/dl at each sample collection
  Estradiol (pg/ml)630.49(0.31 –0.67)
  Estrone (pg/ml)630.70(0.56 –0.81)
  Estrone sulfate (pg/ml)200.68(0.28 –0.92)
  Progesterone (ng/dl)630.45(0.27 –0.65)
 Women with progesterone levels ≥300 ng/dl and with blood obtained between 4 and 10 days before the beginning of next cycle at each sample collection
  Estradiol (pg/ml)390.62(0.43 –0.78)
  Estrone (pg/ml)390.69(0.52 –0.82)
Urinary metabolite
 2-hydroxyestronea860.58(0.43 –0.71)
 16α-hydroxyestronea860.56(0.41–0.70)
 Ratiob860.71(0.60–0.80)
  • a Metabolite values (ng/ml) are divided by the creatinine levels (mg/ml) of each sample.

  • b 2-Hydroxyestrone:16α-hydroxyestrone.