Table 3. Thyroid function in pregnant women from Yongchuan, Chongqing, stratified by trimester.
| Trimester | N | FT3 (pmol/L) | FT4 (pmol/L) | TSH (mU/L) |
|---|---|---|---|---|
| 1st | 100 | 3.11 (1.67 – 4.18)a | 12.5 (7.31 – 21.10)a | 1.45 (0.01 – 6.21)a |
| 2nd | 100 | 2.77 (0.96 – 5.36)a | 11.5 (7.10 – 18.40)a | 1.88 (0.01 – 6.34)a |
| 3rd | 100 | 2.57 (0.86 – 6.08) | 9.19 (0.20 – 17.74) | 2.27 (0.00 – 10.8) |
Data are reported as median (minimum - maximum).
a
Compared to the 3rd trimester, P < 0.05 (Kruskal–Wallis). FT3: Free triiodothyronine, FT4: Free thyroxine, TSH: Thyroid-stimulating hormone