Table 1.
Maternal demographics and age 10 characteristics of EP and term born children
| EP (n = 59) |
Term (n = 59) |
t, X2 p |
|
|---|---|---|---|
| Maternal demographics | |||
| Maternal age, years at birth | M=30.4 (SD=5.9) | M=30.7 (SD=5.0) | t = 0.3 p = .79 |
| Maternal education at age 10 | |||
| ≤ 12 (high school) | 28 (49.1%) | 12 (20.7%) | X2 = 10.7 p = .005 |
| > 12, < 16 | 8 (14.0%) | 16 (27.6%) | |
| ≥ 16 (≥ college) | 21 (36.8%) | 30 (51.7%) | |
| Maternal marital status at age 10 | |||
| Single | 22 (37.3%) | 8 (13.6%) | X2 = 8.8 p = .003 |
| Married/partnered | 37 (62.7%) | 51 (86.4%) | |
| Racial identity | |||
| White | 36 (61.0%) | 46 (78.0%) | X2 = 13.8 p = .008 |
| Black | 18 (30.5%) | 3 (5.1%) | |
| Asian | 2 (3.4%) | 4 (6.8%) | |
| Native American | 0 (0%) | 0 (0%) | |
| Mixed | 2 (3.4%) | 3 (5.1%) | |
| Not identified | 1 (1.7%) | 3 (5.1%) | |
| Hispanic | |||
| Yes | 4 (6.8%) | 9 (15.3%) | X2 = 2.3 p = .14 |
| No | 55 (93.2%) | 50 (84.8%) | |
| Child characteristics at age 10 years | |||
| Child age | M=10.0 (SD=0.7) | M= 10.0 (SD=0.6) | t = 0.3 p = .81 |
| Nonverbal IQ | M=70.4 (SD=25.9) | M=72.3 (SD=23.5) | t = 0.4 p = .68 |
| < 55 | 15 (25.4%) | 12 (20.3%) | X2 = .55 p = .91 |
| 55–69 | 10 (16.9% | 12 (20.3%) | |
| 70–84 | 16 (27.1%) | 17 (28.8%) | |
| ≥ 85 | 18(30.5%) | 18(30.5%) | |
| Verbal IQ1 | 62.6 (28.5) | 74.8 (SD=27.5) | t = 1.5 p = .13 |
| < 55 | 24 (42.1%) | 19 (32.2% | X2 = 2.5 p = .52 |
| 55–69 | 8 (14.0%) | 6 (10.2%) | |
| 70–84 | 11 (19.3%) | 14(23.7%) | |
| ≥ 85 | 14 (24.6%) | 20( 33.9%) | |
1
Two EP participants were missing verbal IQ scores