TABLE 3.
Nonpregnant Women (age 15–44 years): Comparisons of T4 and TSH values Across UI Ranges
| Variable | UI ≤ 5 mg/dL (n = 483) |
UI 5 to <20 µg/dL (n = 2214) |
UI ≥ 20 µg/dL (n = 1157) |
P |
|---|---|---|---|---|
| Thyroxine (T4) (µg/dL) | 9.22 ± 0.09 | 9.22 ± 0.04 | 9.35 ± 0.06 | |
| Med 9.2 | Med 9.0 | Med 9.2 | 0.101 | |
| Range 0.4–14.5 | Range 0.4–14.9 | Range 0.4–14.9 | ||
| T4 (nmol/L) | 118.62 ± 1.18 | 118.65 ± 0.54 | 120.35 ± 0.75 | |
| Med 118.4 | Med 115.8 | Med 118.4 | 0.101 | |
| Range 5.1–186.6 | Range 5.1–191.8 | Range 5.1–191.8 | ||
| TSH (µU/mL = mU/L) | GM 1.6 ± 0.10 | GM 1.4 ± 0.04 | GM 1.5 ± 0.06 | |
| Med 1.3 | Med 1.20 | Med 1.2 | 0.157 | |
| Range: 0.0–4.3 | Range 0.0–4.3 | Range 0.0–4.5 |
Descriptive data are summarized in the format: mean ± SE (T4) or geometric mean ± SE (TSH) & median, range (minimum–maximum). Total n = 3854.