Table 1.
Maternal characteristics of 404 women and infants enrolled in the Children’s Environmental Health Study, 1998–2002 [no. (%)].
| Characteristic | Mothers with phenol measurements (n = 367) | Mothers with phthalate metabolite measurements (n = 382) | All mothers (n = 404) |
|---|---|---|---|
| Maternal age (years) | |||
| < 20 | 129 (35) | 133 (35) | 142 (35) |
| 20–29 | 160 (44) | 168 (44) | 176 (44) |
| ≥ 30 | 78 (21) | 81 (21) | 86 (21) |
| Race/ethnicity | |||
| White | 76 (21) | 80 (21) | 86 (21) |
| Nonwhite | 291 (79) | 302 (79) | 318 (79) |
| Black | 103 (28) | 107 (28) | 112 (28) |
| Hispanic | 182 (50) | 190 (50) | 200 (50) |
| Other | 6 (2) | 5 (1) | 6 (1) |
| Marital status | |||
| Married or living with a partner | 195 (53) | 205 (54) | 215 (53) |
| Divorced/widowed/separated/single | 172 (47) | 177 (46) | 189 (71) |
| Education | |||
| < High school | 107 (29) | 113 (30) | 118 (29) |
| ≥ High school | 258 (71) | 267 (70) | 284 (70) |
| Prepregnancy BMI (kg/m2) | |||
| < 20 | 72 (20) | 76 (20) | 82 (20) |
| 20–24.9 | 196 (54) | 203 (53) | 214 (53) |
| 25–29.9 | 68 (19) | 69 (18) | 72 (18) |
| ≥ 30 | 30 (8) | 33 (9) | 35 (9) |
| Pregnancy weight gain (lb) | |||
| < 25 | 53 (16) | 56 (17) | 58 (16) |
| 25–34.9 | 89 (27) | 90 (27) | 96 (27) |
| 35–44.9 | 76 (23) | 77 (23) | 80 (23) |
| ≥ 45 | 111 (34) | 116 (34) | 123 (34) |
| Smoking during pregnancy | |||
| No | 349 (95) | 362 (95) | 383 (95) |
| Yes | 18 (5) | 20 (5) | 21 (5) |