TABLE 7.
Men (Age 15–44 years): Comparisons Across UI Ranges
| Variable | UI ≤ 5 µg/dL (n = 263) |
UI 5 –<20 µg/dL (n = 2093) |
UI ≥ 20 µg/dL (n = 1445) |
P |
|---|---|---|---|---|
| Thyroxine (T4) (µg/dL) | 8.52 ± 0.13 | 8.56 ± 0.04 | 8.54 ± 0.05 | |
| Med 8.4 | Med 8.5 | Med 8.5 | 0.824 | |
| Range 0.4–14.5 | Range 0.4–14.6 | Range 0.4–14.7 | ||
| T4 (nmol/L) | 109.64 ± 1.62 | 110.22 ± 0.50 | 109.91 ± 0.59 | |
| Med 146.1 | Med 109.4 | Med 109.4 | 0.824 | |
| Range 5.1–108.1 | Range 5.1–187.9 | Range 5.1–189.2 | ||
| TSH (µU/mL = mU/L) | GM 1.6 ± 0.104 | GM 1.70 ± 0.10 | GM 1.81 ± 0.10 | |
| Med 1.3 | Med 1.3 | Med 1.33 | 0.044 | |
| Range 0.2 ± 3.8 | Range 0.0–4.4 | Range 0.0–4.4 |
Descriptive data are summarized in the format mean ± SE (T4) or geometric mean ± SE (TSH) and median, range (minimum–maximum).