Table 2.

Year 2 hormone levels and change in hormones by race and OC use

	Non-OC users		OC users
	n	Value	n	Value
Blacks
Total Ta, median (interquartile range), ng/dl	251	41.0 (29.0–57.0)	106	26.5 (16.0–43.0)
Change in total Tb, mean (sd), ng/dl
yr 10 − yr 2	149	−6.4 (16.4)c	16	−9.1 (14.1)
yr 16 − yr 10	255	−10.3 (15.9)c	15	−4.7 (12.9)
Free Ta, median (interquartile range),	250	0.31 (0.21–0.43)	106	0.12 (0.06–0.23)
Change in free Tb, mean (sd), ng/dl
yr 10 − yr 2	147	−0.04 (0.15)	16	−0.08 (0.16)
yr 16 − yr 10	255	−0.07 (0.14)	15	−0.03 (0.08)
SHBGa, median (interquartile range), ng/dl	250	24.0 (19.0–33.0)c	107	44.0 (32.0–58.0)
Change in SHBGb, mean (sd), ng/dl
yr 10 − yr 2	148	−1.15 (9.0)	16	−0.81 (16.4)
yr 16 − yr 10	256	−0.93 (9.0)	15	3.93 (15.0)
Whites	N		N
Total Ta, median (interquartile range), ng/dl	241	44.0 (31.0–55.0)	121	23.0 (16.0–36.0)
Change in total Tb, mean (sd), ng/dl
yr 10 − yr 2	134	−10.3 (16.8)c	19	−8.8 (10.0)
yr 16 − yr 10	208	−6.3 (14.1)c	25	−3.0 (10.9)
Free Ta, median (interquartile range), ng/dl	241	0.30 (0.19–0.44)	121	0.11 (0.06–0.19)
Change in free Tb, mean (sd), ng/dl
yr 10 − yr 2	134	−0.07 (0.14)	19	−0.04 (0.08)
yr 16 − yr 10	209	−0.05 (0.13)	25	0.00 (0.05)
SHBGa, median (interquartile range), ng/dl	245	27.0 (20.0–36.0)c	122	45.0 (33.0–62.0)
Change in SHBGb, mean (sd), ng/dl
yr 10 − yr 2	136	0.13 (8.8)	19	−0.42 (19.0)
yr 16 − yr 10	210	−0.79 (10.2)	25	−5.4 (18.2)

^aFrom yr 2; excludes women who were pregnant or breastfeeding at yr 2. 

^bExcludes women who were pregnant at either point in time or breastfeeding at either yr 2 or 10 or who were not consistently non-OC users or OC users at both points in time. 

^cSignificant difference in means between Blacks and Whites within stratum of non-OC users (P < 0.05) based on nonparametric test.