Table 3.
First-Trimester: Comparison of the Demographic Characteristics of Patients With Thyroid Hypofunction Compared With Euthyroid Patients
| Characteristic | Subclinical Hypothyroid (n=240) |
Hypothyroxinemia (n=232) |
Euthyroid (n=10,021) |
P |
|---|---|---|---|---|
| Age (y) | 29.8±5.7 | 31.6±5.6 | 29.5±5.6 | <.001 |
| Race | .019 | |||
| White | 90.8 | 83.2 | 87.0 | |
| African American | – | 3.9 | 1.6 | |
| Hispanic | 5.4 | 9.5 | 7.2 | |
| Prior pregnancy (%) | 67.8 | 79.3 | 68.0 | .001 |
| Parity | 1.1 + 1.2 | 1.6±1.6 | 1.0±1.2 | <.001 |
| Body mass index | 24.5±4.5 | 27.3±5.8 | 24.8±5.1 | <.001 |
| Education (y) | 14.8±1.9 | 14.3±2.0 | 14.6±2.0 | .010 |
| Married | 95.0 | 87.5 | 91.4 | .015 |
| Current smoker | 2.1 | 6.1 | 2.9 | .016 |
| History of chromosomal abnormality | – | – | 0.10 | .790 |
| ART in current pregnancy | 5.4 | 2.2 | 4.4 | .183 |
ART, assisted reproductive technology.
Data are mean±standard deviation or %.