Table 2.
Thyroid Function Test Results for Women at 28 Weeks of Pregnancy Split by Whether They Had Subclinical Hypothyroidism in Pregnancy (TSH >3 mIU/L) or Not (TSH ≤3 mIU/L)
| Pregnancy |
P | Postpregnancy |
P | |||
|---|---|---|---|---|---|---|
| TSH ≤3 mIU/L (n = 458) | TSH >3 mIU/L (n = 65) | TSH ≤4.5 mIU/L (n = 486) | TSH >4.5 mIU/L (n = 28) | |||
| TSH, mIU/L | 1.7 (1.32, 2.15) | 3.57 (3.24, 4.23) | <.0001 | 1.84 (1.28, 2.44) | 5.35 (4.76, 6.77) | <.0001 |
| FT4, pmol/L | 12.13 (11.16, 13.06) | 11.9 (11.18, 12.64) | .29 | 14.8 (13.6, 16) | 14.0 (12.45, 15.25) | .02 |
| FT3, pmol/L | 4.12 (3.85, 4.42) | 4.16 (3.88, 4.44) | .52 | 4.5 (4.2, 4.8) | 4.45 (4.1, 4.8) | .67 |
| TPO-Ab positive | 48/458 (10) | 16/65 (25) | .001 | 47/486 (10) | 11/28 (39) | <.0001 |
Similar results were presented for postpregnancy thyroid function test results (split by women with TSH >4.5 mIU/L or with TSH≤4.5 mIU/L), excluding those taking l-thyroxine and those with Graves disease (n = 9). Data are presented as median (interquartile range) or n (%).