Table 1.

Comparison of Disease-Free and Reference Populations on Thyrotropin Median, and 2.5th and 97.5th Centiles for All Subjects, Blacks, Mexican Americans, and Whites Racial/Ethnic Groups by Decades of Age

All
	Disease free (n = 15,133)			Reference population (n = 13,296)
Age (years)	2.5th centile	Median	97.5th centile	2.5th centile	Median	97.5th centile
All ages	0.43	1.41	5.04	0.42	1.40	4.30
13–19	0.41	1.30	3.98	0.41	1.30	3.78
20–29	0.40	1.30	3.98	0.40	1.30	3.60
30–39	0.39	1.30	4.17	0.38	1.25	3.60
40–49	0.44	1.41	4.75	0.44	1.40	3.90
50–59	0.50	1.58	5.07	0.49	1.50	4.20
60–69	0.46	1.70	5.56	0.46	1.66	4.70
70–79	0.47	1.83	7.11	0.47	1.74	5.60
80+	0.44	1.99	6.90	0.44	1.90	6.30

Blacks
	Disease free (n = 4430)			Reference population (n = 4194)
Age (years)	2.5th centile	Median	97.5th centile	2.5th centile	Median	97.5th centile
All ages	0.36	1.25	3.90	0.36	1.25	3.70
13–19	0.36	1.20	3.75	0.35	1.20	3.78
20–29	0.36	1.10	3.30	0.36	1.10	3.30
30–39	0.33	1.16	3.39	0.33	1.10	3.24
40–49	0.42	1.30	3.90	0.42	1.30	3.74
50–59	0.43	1.40	4.50	0.44	1.40	3.99
60–69	0.35	1.50	4.64	0.35	1.58	4.20
70–79	0.39	1.50	5.20	0.39	1.50	5.20
80+	0.45	1.60	5.76	0.42	1.50	4.60

Mexican Americans
	Disease free (n = 4410)			Reference population (n = 3854)
Age (years)	2.5th centile	Median	97.5th centile	2.5th centile	Median	97.5th centile
All ages	0.47	1.49	5.20	0.46	1.40	4.37
13–19	0.43	1.40	4.30	0.42	1.33	3.73
20–29	0.47	1.40	4.13	0.47	1.33	3.62
30–39	0.41	1.33	4.68	0.40	1.30	3.75
40–49	0.41	1.50	4.95	0.40	1.49	3.99
50–59	0.56	1.60	5.84	0.55	1.50	4.85
60–69	0.51	1.83	6.13	0.51	1.80	5.54
70–79	0.54	2.10	7.55	0.59	2.13	7.12
80+	0.57	2.10	7.11	0.55	1.91	7.84

Whites
	Disease free (n = 5603)			Reference population (n = 4671)
Age (years)	2.5th centile	Median	97.5th centile	2.5th centile	Median	97.5th centile
All ages	0.50	1.60	5.70	0.49	1.50	4.60
13–19	0.49	1.41	4.10	0.49	1.40	3.93
20–29	0.48	1.30	4.10	0.46	1.30	3.60
30–39	0.47	1.40	5.20	0.46	1.37	3.76
40–49	0.56	1.50	5.37	0.57	1.49	3.95
50–59	0.54	1.60	5.30	0.52	1.58	3.97
60–69	0.51	1.74	5.63	0.56	1.66	4.31
70–79	0.47	1.91	7.32	0.46	1.80	5.60
80+	0.41	2.10	7.02	0.41	1.99	6.56