Table 1.
Cohort Characteristics at Time of Enrollment
| Low SES | Higher SES | p-value | |
|---|---|---|---|
| Income-to-Needs | |||
| At or below poverty line | 27 (100%)a | 0 | -- |
| Above poverty line | 0 | 25 (100%) | -- |
| 100–199% of poverty line | - | 15(60%) | -- |
| ≥200% of poverty line | - | 10(40%) | -- |
|
| |||
| Education | |||
| Less than high school | 17 (63%) | 0 | |
| High school/GED | 10 (37%) | 5 (20%) | |
| Some college | 0 | 6 (24%) | |
| Two-year college degree | 0 | 8 (32%) | |
| Four-year college degree | 0 | 3 (12%) | |
| Graduate school | 0 | 3 (12%) | |
|
| |||
| Maternal age at delivery, yr. | 24.6 ± 5.1b | 28.5 ± 5.9 | 0.015 |
|
| |||
| Infant gestational age (wks) | 39.3 ± 0.9 | 39.6 ± 0.9 | 0.25 |
| Birth weight (kg) | 3.2 ± 0.3 | 3.4 ± 0.4 | 0.10 |
| Head circumference (cm) | 33.4 ± 1.4 | 34.1 ± 1.6 | 0.14 |
a
n (%),
b
Mean ± SD