Table 1. Comparisons of demographic distributions and weight and height measurements at three years of age among children in the Total cohort, the Child and Prenatal samplesa.
| Characteristic | Total Cohort 727 (%) | Child Sample 229 (%) | Prenatal Sample 181(%) |
|---|---|---|---|
| Maternal age at delivery | 25.1 (4.9) | 25.3 (5.1) | 24.9 (46) |
| Race/Ethnicity | |||
| Dominican American | 473 (65.1) | 128 (55.9) | 114 (63.0) |
| African American | 254 (34.9) | 101 (44.1) | 67 (37.0) |
| Marital status (n=721) | |||
| Never Married | 473 (66.6) | 155 (68.0) | 125 (69.1) |
| Ever Married | 246 (34.4) | 73 (32.0) | 56 (30.9) |
| Maternal education (n=713) | |||
| < High school degree | 175 (35.9) | 82 (36.4) | 66 (36.5) |
| ≥ High school degree or GED | 313 (64.1) | 143 (63.6) | 115 (63.5) |
| Sex | |||
| Girls | 376 (51.7) | 120 (52.4) | 99 (54.7) |
| Boys | 351 (48.3) | 109 (47.6) | 82 (45.3) |
| Birth Weight (kg) | 3,369.8 (476.4)b | 3,375.3 (512.1)c | 3,421.4 (478.70)d |
| Gestational Age (weeks) | 39.3 (1.4)e | 39.3 (1.5)e | 39.4 (1.3)d |
| Child age at phthalate assessment (months) | 37.1 (2.3)f | 37.2 (2.4) | 37.0 (2.1)g |
| Physical Measurement at 3 years | n=499 | n=214 | n=161 |
| Weight(kg) Mean ± SD | 16.5 ± 3.1 | 16.4 ± 3.0 | 16.2 ± 2.7 |
| Height (cm) Mean ± SD | 98.3 ± 5.0 | 98.3 ± 5.5 | 98.3 ± 5.2 |
a
Analyses include one subject who did not have FT4 (free thyroxine) measurements but had TSH (thyroid-stimulating hormone) measurements.
b
Birth weight available on n=709.
c
Birth weight available on n=227.
d
Birth weight and gestational age available on n=179.
e
Gestational age available on n=717.
e
Gestational age available on n=228.
f
Child age at phthalate assessment n=428
g
Child age at phthalate assessment n=199