Table 2. Pearson correlation analysis between TSH and perinatal factors.
| Variable | TSH | lnTSH | ||
|---|---|---|---|---|
| r | P-value | r | P-value | |
| Gestational age | –0.024 | 0.518 | –0.001 | 0.972 |
| Birth weight | –0.062 | 0.101 | –0.051 | 0.179 |
| Birth length | –0.054 | 0.152 | –0.040 | 0.288 |
| Head circumference | –0.058 | 0.125 | –0.037 | 0.323 |
| Sample time | –0.089 | 0.018 | –0.100 | 0.008 |
| ROM | 0.017 | 0.651 | 0.022 | 0.555 |
| Maternal age | 0.026 | 0.483 | –0.003 | 0.945 |
| 17OHP | 0.164 | <0.001 | 0.170 | <0.001 |
| ln17OHP | 0.208 | <0.001 | 0.220 | <0.001 |
| FT4 | 0.020 | 0.611 | 0.027 | 0.487 |
| lnFT4 | 0.020 | 0.601 | 0.023 | 0.540 |
TSH, thyroid stimulating hormone; lnTSH, log transformed TSH; 17OHP, 17-α hydroxyprogesterone; ln17OHP, log transformed 17OHP; FT4, free thyroxine; lnFT4, log transformed free T4; ROM, rupture of membrane.