Table 1.
Characteristics of participants at birth and follow-up, Mount Sinai Children’s Environmental Health Study 1998–2002.
| Characteristic | Birth cohort n (%) | Study sample n (%) |
|---|---|---|
| Total (n) | 404 | 180 |
| Race/ethnicity | ||
| Non-Hispanic white | 86 (21.3) | 34 (18.9) |
| Non-Hispanic black | 112 (27.7) | 51 (28.3) |
| Hispanic or other | 206 (51) | 95 (52.8) |
| Maternal age at delivery (years) | ||
| < 20 | 142 (35.2) | 56 (31.1) |
| 20–24 | 132 (32.7) | 60 (33.3) |
| 25–29 | 44 (10.9) | 26 (14.4) |
| ≥ 30 | 86 (21.3) | 38 (21.1) |
| Maternal education (≥ college degree) | 100 (24.8) | 40 (22.2) |
| Maternal work status (employed) | 235 (58.2) | 107 (59.4) |
| Maternal smoking during pregnancy | 67 (16.6) | 31 (17.2) |
| Maternal prepregnancy BMI (kg/m2) | ||
| < 18.5 | 82 (20.3) | 10 (5.6) |
| 18.5–24.9 | 215 (53.2) | 111 (61.7) |
| 25–29.9 | 72 (17.8) | 42 (23.3) |
| ≥ 30 | 35 (8.7) | 17 (9.4) |
| Maternal height (m) (mean ± SD) | 1.63 ± 0.07 | 1.62 ± 0.08 |
| Adequacy of gestational weight gain | ||
| Less than recommended | 44 (12.3) | 14 (8.9) |
| Recommended | 75 (21) | 40 (25.3) |
| More than recommended | 238 (66.7) | 104 (65.8) |
| Missing | 47 | 22 |
| Year of maternal urine collection | ||
| 1998 | 84 (21.9) | 34 (18.9) |
| 1999 | 127 (33.2) | 55 (30.6) |
| 2000 | 134 (35) | 72 (40) |
| 2001 | 35 (9.1) | 18 (10) |
| 2002 | 3 (0.8) | 1 (0.6) |
| Urine not collected | 21 | 0 |
| Child’s sex (male) | 222 (55) | 98 (54.4) |
| Breastfed | ||
| Ever | 206 (63) | 113 (63.1) |
| Never | 121 (37) | 66 (36.9) |
| Missing | 77 | 1 |
| Physical activity at follow-upa | ||
| Inactive | 100 (56.5) | |
| Active most of the time | 77 (43.5) | |
| Missing | 3 | |
| aProportion classified as inactive at any follow-up visit. | ||