Table 4. Correlations of hormone levels between first and third trimesters by racial groups.

	White mothers (n=150)		Black mothers (n=150)
Hormones	Pearson's correlation coefficient	P-value	Pearson's correlation coefficient	P-value
Alphafetoprotein	−0.07	0.40	−0.02	0.77
Total estradiol	0.25	<0.01	0.35	<0.01
Free estradiol	0.41	<0.01	0.49	<0.01
Free and albumin-bound estradiol	0.41	<0.01	0.49	<0.01
Total estriol	0.16	0.05	0.43	<0.01
Total testosterone	0.53	<0.01	0.67	<0.01
Free testosterone	0.57	<0.01	0.56	<0.01
Free and albumin-bound testosterone	0.57	<0.01	0.56	<0.01
Sex hormone binding globulin	0.23	<0.01	0.43	<0.01