Table 1.
Birth, Demographic, and School Entry Characteristics
| Variable | EP Group (n = 148) |
NBW Group (n = 111) |
|---|---|---|
| Birth and Neonatal Data: | ||
| Birth weight in grams, Mean (SD)a | 818.37 (174.01) | 3382.25 (445.86) |
| Gestational age in weeks (SD) a | 25.85 (1.64) | >36 weeks |
| Multiple birth* | 31 (21%) | 0 |
| Maternal Demographic Datab | ||
| Married | 69 (47%) | 65 (59%) |
| Education: | ||
| <high school | 20 (14%) | 14 (13%) |
| high school or GED | 33 (22%) | 16 (14%) |
| >high school | 95 (64%) | 81 (73%) |
| Median family income (SD)c | 59.10 (32.37) | 56.20 (23.67) |
| Child Status at School Entryd | ||
| African Americane | 91 (61%) | 61(55%) |
| Males (%) | 68 (46%) | 51(46%) |
| Age at kindergarten entry, mean years (SD)* | 5.60 (.42) | 5.43 (.30) |
| Age at testing, mean years (SD) | 5.96 (.37) | 5.96 (.31) |
| Months in school at testing* | 4.25 (2.34) | 6.38 (1.72) |
| Age at time of teacher rating of progress, mean years (SD)* | 6.18 (.37) | 6.03 (.31) |
| Months in school at teacher rating | 7.16 (1.75) | 7.11 (1.68) |
Abbreviations: EP = extreme prematurity; NBW = term-born normal birth weight; Bayley Scales of Infant Development, 2nd Edition Mental Development Index; 46 GED = General Education Diploma.
Birth weight and gestational ages of NBW group based on maternal report; groups different by definition.
Refers to primary caregiver, which was the biologic or adoptive mother for 143 (97%) of the EP children and 105 (95%) of the NBW group.
Based on data on the neighborhood tract of the family residence from the 2000 US Census.48 Family income is in thousands of dollars.
The EP children and controls attended 113 different schools within 57 school districts located in the region surrounding Cleveland, Ohio.
All others Caucasian except for 4 Asian (2 in each group).
Significant group difference, p<.01.