Table 1 Participants’ neonatal and socio-demographic details
| Â | Assessed at 15 years | Assessed 19 at years | Assessed at both time points | ||||
|---|---|---|---|---|---|---|---|
VLBW | Control | VLBW | Control | VLBW | Control | ||
Number of participants | 40 | 56 | 44 | 60 | Â | 30 | 37 |
Males (%) | 18 (45) | 21 (37) | 18 (41) | 25 (42) | Â | 11 (37) | 14 (38) |
Background information | |||||||
Birthweight (grams) M (SD) | 1204 (236)*** | 3713 (500) | 1212 (234)*** | 3698 (501) | Â | 1223 (250)*** | 3766 (544) |
Gestational age (weeks) M (SD) | 29.18 (2.65)*** | 39.61 (1.15) | 29.25 (2.54)*** | 39.72 (1.27) |  | 29.43 (2.60)*** | 39.51 (1.17) |
Age (years-months) M (SD) | 15-2 (0-6) | 15-5 (0-5) | 19-7 (0-7) | 19-8 (0-6) | Time 1 | 15-2 (0-6) | 15-5 (0-5) |
| Â | Â | Â | Â | Â | Time 2 | 19-9 (0-8) | 19-7 (0-6) |
IQ M (SD) | Â | Â | 89.00 (12.54)*** | 99.85 (10.62) | Â | 86.33 (13.52)*** | 100.14 (11.03) |
SES (1 – 5) M (SD) | 3.15 (1.25) | 3.59 (1.04) | 3.39 (1.38) | 3.70 (0.95) |  | 3.27 (1.33) | 3.65 (0.92) |
SES class 1 n (%) | 5 (12) ** | 0 (0) | 6 (15) * | 1 (2) | Â | 4 (13) * | 0 (0) |
SES class 2 n (%) | 7 (17) | 10 (18) | 5 (12) | 4 (7) | Â | 5 (17) | 4 (11) |
SES class 3 n (%) | 11 (28) | 16 (29) | 7 (17) | 17 (32) | Â | 6 (20) | 12 (32) |
SES class 4 n (%) | 11 (28) | 17 (30) | 13 (32) | 21 (39) | Â | 9 (30) | 14 (38) |
SES class 5 n (%) | 6 (15) | 13 (23) | 10 (24) | 11 (20) | Â | 6 (20) | 7 (19) |