Table 3

Correlation between duplicate measurements of cord blood hormone levels

Pearson’s raP
All subjects (n = 25)
 Estrone0.960.0001
 Total estradiol0.890.0001
 Weakly bound estradiol0.900.0001
 SHBG0.970.0001
Duplicates measured in same batchb (n = 11)
 Estrone0.980.0001
 Total estradiol0.960.0001
 Weakly bound estradiol0.960.0001
 SHBG1.000.0001
Duplicates measured in different batchesc (n = 14)
 Estrone0.980.0001
 Total estradiol0.880.0001
 Weakly bound estradiol0.900.0001
 SHBG0.960.0001
  • a Based on data on the logarithmic scale (base 10).

  • b Both of the duplicates from the same blood sample were measured in December 1997 (schedule 2).

  • c One of the duplicates from the same blood sample was measured in August 1997, and the other was measured in December 1997 (schedule 1).