TABLE 1.
Comparison of UI, T4, and TSH Concentrations in NHANES III (1988–1994): Men vs. Nonpregnant Women (age 15–44 years)
| Variable | Male (n = 3774) |
Female (n=3854) |
P |
|---|---|---|---|
| Urinary iodine (µg/dL) | GM 15.80 ± 1.01 | GM 13.0 6 ±.01 | |
| Med 16.3 | Med 13.8 | 0.000 | |
| Range 1.01–146 | Range 0.5–140 | ||
| Thyroxine (T4 (µg/dL) | 8.50 ± 0.03 | 9.30 ± 0.03 | |
| Med 8.5 | Med 9.2 | 0.000 | |
| Range 0.4–14.7 | Range 0.4–14.9 | ||
| T4 (nmol/L) | 110.10 ± 0.40 | 119.2 ± 0.41 | |
| Med 109.4 | Med 117.1 | 0.000 | |
| Range 5.1–189.2 | Range 5.1–191.8 | ||
| TSH (µU/mL = mU/L) | GM 1.70 ± 0.04 | GM 1.50 ± 0.03 | |
| Med 1.3 | Med 1.3 | 0.000 | |
| Range 0.01–4.4 | Range 0.01–4.5 |
UI and TSH are presented as geometric means ± SE, and T4 as arithmetic mean ± SE.