Table 1.
Perinatal and demographic characteristics of study participants.
| VPT n* = 175 |
Term Control n* = 69 |
||
|---|---|---|---|
| Perinatal | GA (weeks), M (SD) | 27.5 (1.9) | 39.1 (1.3) |
| Birth Weight (g), M (SD) | 969 (222) | 3313 (505) | |
| Singleton, n (%) | 100 (57.1) | 65 (94.2) | |
| Male, n (%) | 93 (53.1) | 34 (49.3) | |
| Bronchopulmonary dysplasia, n (%) | 58 (33.1) | n/a | |
| Cystic periventricular leukomalacia, n (%) | 7 (4.0) | n/a | |
| Intraventricular hemorrhage grade 3/4, n (%) | 5 (2.9) | n/a | |
| Proven sepsis, n (%) | 77 (44.0) | 1 (2.4) | |
| Necrotising enterocolitis (proven), n (%) | 9 (5.1) | n/a | |
| Patent ductus arteriosus, n (%) | 86 (49.1) | n/a | |
| Length of stay (days), M (SD) | 87 (32.7) | 5.2 (3.7) (n = 43) |
|
| 7 years | Corrected age at assessment (years), M (SD) | 7.5 (0.2) | 7.6 (0.3) |
| Social risk score, median (interquartile range) | 2 (1-3) (n = 168) |
1 (0-2) (n = 68) |
|
| Cerebral palsy, n (%) | 5 (2.9) | n/a | |
| Handedness M (SD) | 10.7 (13.5) | 13.8 (10.9) | |
| Range | − 23 to 24 | − 24 to 24 | |
| NRH, n (%) | 54 (30.9) | 15 (21.7) | |
| Left handed, n (%) | 23 (13.1) | 4 (5.8) | |
| Mixed handed, n (%) | 31 (17.7) | 11 (15.9) | |
| Right handed, n (%) | 121 (69.1) | 54 (78.3) | |
| Parental left handedness, n (%) | 36 (27.9) (n = 129) |
16 (29.6) (n = 54) |
*
For some variables, the sample size is less than the total sample due to missing data; actual sample reported in table NRH, non-right handedness; GA, gestational age; M, mean; SD, standard deviation