TABLE 4.
Nonpregnant Women (age 15–44 years): Comparisons of T4 and TSH Values Across 4-level UI/Cr Ranges
| Variable | UI/Cr 0–50 µg/g (n = 398) |
UI/Cr 50.01–100 µg/g (n = 1358) |
UI/Cr 100.01–200 µg/g (n = 1392) |
UI/Cr 200.01+µg/g (n = 704) |
P |
|---|---|---|---|---|---|
| Thyroxine (T4) (µg/dL) | 9.32 ± 0.10 | 9.26 ± 0.05 | 9.29 ± 0.05 | 9.18 ± 0.07 | |
| Med 9.2 | Med 9.0 | Med 9.1 | Med 9.0 | 0.611 | |
| Range 0.4–14.9 | Range 0.4–14.9 | Range 0.4–14.9 | Range 0.4–14.9 | ||
| T4 nmol/L | 120.0 ± 1.30 | 119.1 ± 0.70 | 119.5 ± 0.68 | 118.2 ± 0.95 | |
| Med 118.4 | Med 115.8 | Med 117.1 | Med 117.1 | 0.611 | |
| Range 5.1–191.8 | Range 5.1–191.8 | Range 5.1–191.8 | Range 5.1–191.8 | ||
| TSH (µU/mL = mU/L) | GM 1.1 ± 0.03 | GM 1.1 ± 0.02 | GM 1.2 ± 0.02 | GM 1.3 ± 0.02 | |
| Med 1.3 | Med 1.1 | Med 1.3 | Med 1.3 | <0.001 | |
| Range 0.1–4.2 | Range 0.0–4.3 | Range 0.0–4.5 | Range 0.0–4.4 |
Descriptive data are summarized in the format mean ± SE or geometric mean ± SE and median, range (minimum–maximum). Total n = 3852.