TABLE 5.
Pregnant Women (age 15–44 years): Comparisons Across UI Ranges
| Variable | UI ≤ 5 µg/dL (n = 16) |
UI 5 to <20 µg/dL (n = 163) |
UI ≥ 20 µg/dL (n = 87) |
P |
|---|---|---|---|---|
| Thyroxine (T4) (µg/dL) | 11.03 ± 0.63 | 11.1 ± 0.16 | 11.21 ± 0.2 | |
| Med 11.35 | Med 11.3 | Med 11.1 | 0.966 | |
| Range 3.5–14.3 | Range 5.7–14.9 | Range 7.0–14.9 | ||
| T4 (nmol/L) | 141.97 ± 8.18 | 142.87 ± 2.11 | 144.33 ± 2.54 | |
| Med 146.1 | Med 145.4 | Med 142.9 | 0.966 | |
| Range 45.0–184.0 | Range 73.4–191.8 | Range 90.1–191.8 | ||
| TSH (µmU/mL = mU/L) | GM 1.10 ± 0.60 | GM 1.10 ± 0.10 | GM 1.10 ± 0.10 | |
| Med 1.4 | Med 1.1 | Med 1.1 | 0.807 | |
| Range 0.2–4.0 | Range 0.0–3.6 | Range 0.1–4.0 |
Descriptive data are summarized in the format mean ± SE or geometric mean ± SE and median, or range (minimum– maximum). n = 266.
The recommended iodine intake for adults is 150 µg/day; for pregnant women 220 µg/day (Corresponding to UI of 150 µg/day), and during lactation 290 µg/day.10