Table 1.
Perinatal and 7 year characteristics of the very preterm and full‐term cohorts
| Very preterm (n = 125) | Full‐term (n = 25) | |
|---|---|---|
| Perinatal characteristics | ||
| GA (weeks), M (SD) | 27.5 (1.9) | 38.7 (1.3) |
| Birth weight (g), M (SD) | 968 (223) | 3255 (517) |
| Small for gestational age, n (%) | 13 (10) | 1 (4) |
| Singleton, n (%) | 68 (54) | 24 (96) |
| Intracranial volume (cc), M (SD) | 447.3 (72.7) | 456.3 (54.6) |
| Neonatal brain abnormality score, M (SD) | 5.3 (3.1) | 1.5 (1.3) |
| Male sex, n (%) | 62 (50) | 14 (56) |
| Antenatal corticosteroids, n (%) | 108 (86) | 0 (0) |
| Postnatal corticosteroidsa, n (%) | 7 (6) | 0 (0) |
| Bronchopulmonary dysplasia, n (%) | 37 (30) | 0 (0) |
| Cystic periventricular leukomalacia, n (%) | 5 (4) | 0 (0) |
| Intraventricular haemorhage grades 3/4, n (%) | 5 (4) | 0 (0) |
| 7 year characteristics | ||
| Age at assessment (years), M (SD) | 7.5 (0.2) | 7.6 (0.2) |
| Intracranial volume (cc), M (SD) | 1332.6 (119.7) | 1435.3 (125.7) |
| Full scale IQ, M (SD) | 98.1 (13.4) | 108.9 (11.9) |
| Impaired verbal immediate memorya, n (%) | 29 (23) | 2 (8) |
| Impaired verbal working memoryb, n (%) | 60 (48) | 4 (16) |
| Impaired spatial immediate memoryc, n (%) | 52 (42) | 3 (12) |
| Impaired verbal learning, n (%) | 24 (19) | 5 (20) |
| Impaired verbal long delay recalla, n (%) | 32 (26) | 3 (12) |
| Impaired spatial learninga, n (%) | 50 (40) | 6 (24) |
| Impaired spatial long delay recalld, n (%) | 31 (25) | 3 (12) |
GA = gestational age, M = mean, SD = standard deviation. Impairment defined as <1 SD from mean of full‐term children.
a
Missing one subject.
b
Missing nine subjects.
c
Missing three subjects.
d
Missing two subjects.