Table 1.
Demographical, clinical, and cognitive data.
| VP/VLBW (n = 101) | FT (n = 111) | ||||||
|---|---|---|---|---|---|---|---|
| M | SD | Range | M | SD | Range | p value | |
| Sex (male/female) | 58/43 | 66/45 | 0.167 | ||||
| Age (years) | 26.7 | ± 0.61 | 25.7–28.3 | 26.8 | ± 0.74 | 25.5–28.9 | 0.765 |
| GA (weeks) | 30.5 | ± 2.1 | 25–36 | 39.7 | ± 1.1 | 37–42 | <0.001 |
| BW (g) | 1,325 | ± 313 | 630–2,070 | 3,398 | ± 444 | 2,120–4,670 | <0.001 |
| Hospitalization (days) | 72.2 | ± 26.4 | 24–170 | 6.9 | ± 3.0 | 2–26 | <0.001 |
| SESa (a.u.) | 29/44/28 | 1–3 | 35/50/26 | 1–3 | 0.760 | ||
| Maternal age (years) | 29.5 | ± 4.8 | 16–41 | 29.4 | ± 5.2 | 18–42 | 0.889 |
| Full-scale IQb (a.u.) | 94.1 | ± 12.7 | 64–131 | 102.5 | ± 11.9 | 77–130 | <0.001 |
Statistical comparisons: sex, SES with χ2 statistics; age, GA, BW, Hospitalization, maternal age, IQ, with two-sample t-tests. Abbreviations: BW, birth weight; FT, full-term; GA, gestational age; IQ, intelligence quotient; M, Mean; maternal age, maternal age at birth; SD, standard deviation; SES, socioeconomic status at birth; VP/VLBW, very preterm and/or very low birth weight. a1 = upper class, 2 = middle class, 3 = lower class. bData are based on 97 VP/VLBW and 108 FT-born individuals.