Table 1. Descriptive characteristics of the VP/VLBW and term participants from birth to age 26 years.
| VP/VLBW (n = 193) |
Term comparisons (n = 217) |
Mean difference (95% CI) |
p | |
|---|---|---|---|---|
| Birth weight (g) | 1343 (323) | 3363 (447) | 2020 (1945–2095) | < .001 |
| Gestational age (weeks) | 30.66 (2.24) | 39.59 (1.11) | 8.92 (8.57–9.27) | < .001 |
| SGA birth (%) | 34.5 | 9.1 | 5.24a | < .001 |
| Sex (% male) | 52.3 | 47.0 | 1.16a | .282 |
| Family SES at birth | 3.52 (1.48) | 3.83 (1.51) | 0.31 (0.01–0.61) | .044 |
| Mathematic abilities at 8 years b | -.72 (1.16) | .14 (.97) | .86 (.65–1.07) | < .001 |
| General cognitive abilities at 8 years b | -.73 (1.34) | .11 (.99) | .85 (.62–1.08) | < .001 |
| Wealth Score at 26 years b, c | -.57 (1.08) | -.01 (1.00) | .56 (.36 - .77) | < .001 |
Please note: Data are presented as mean (standard deviation) if not indicated otherwise.
aχ2-value;
b z-standardized according to term comparisons, age at assessment was the same in both groups;
c reverse coded