Table 1.
Sociodemographic characteristics of 284 mothers enrolled during the first half of pregnancy from New York City prenatal clinics between 2009–2010, New York City
| Variable | N (%) |
|---|---|
| Ethnicity | |
| Hispanic | 196 (69%) |
| Non Hispanic | 88 (31%) |
| Maternal age (mean years ± SD) | 29 ± 6.3 |
| Maternal education | |
| Less than high school diploma | 47 (17%) |
| High school or equivalent | 67 (24%) |
| College Degree (or some college) | 123 (44%) |
| Graduate Degree | 45 (16%) |
| Household income | |
| <$25,000 | 179 (63%) |
| $25,000–50,000 | 30 (11%) |
| >$50,000 | 75 (26%) |
| Prepregnancy BMI | |
| Underweight (< 18.5) | 18 (6%) |
| Normal (18.5 to 24.9) | 158 (56%) |
| Overweight (25–29.9) | 70 (25%) |
| Obese (> 30) | 38 (13%) |
| Parity (≥1) | 198 (69.7%) |
| Gestational age at urine/blood collection (mean weeks ± SD) | 12.2 ± 2.8 |
| Cigarette smoking | 6 (2.1%) |
| Thyroid Function Category*,** | |
| Euthyroid | 237 (83%) |
| Subclinical hypothyroid | 24 (9%) |
| Clinical/overt hypothyroid | 3 (1%) |
| Hypothyroxinemia | 20 (7%) |
*
Thyroid function categories provided in Supplementary Table 1
**
All subclinical or clinical hyperthyroid subjects were excluded from analyses (N = 9)