Summary results on the Griffiths scales at 1 and 2 years
| Locomotor | Personal/social | Hearing and speech | Eye and hand | Performance | DQ | |
|---|---|---|---|---|---|---|
| 1 year (n = 59) | ||||||
| Mean | 103.32 | 102.73 | 97.70 | 98.07 | 99.98 | 100.34 |
| SD | 19.45 | 14.00 | 16.37 | 16.25 | 17.23 | 15.05 |
| Range | 35–133 | 57–135 | 47–133 | 44–131 | 48–141 | 55–130 |
| Number (%) <1 SD below mean | 7 (11.9) | 5 (8.5) | 11 (18.6) | 8 (13.6) | 6 (10.3) | 7 (11.9) |
| 2 years (n = 45) | ||||||
| Mean | 104.62 | 106.67 | 102.18 | 99.04 | 105.18 | 103.53 |
| SD | 12.14 | 13.87 | 20.78 | 12.18 | 17.79 | 12.33 |
| Range | 87–151 | 80–151 | 62–150 | 75–133 | 62–158 | 81–140 |
| Number (%) <1 SD below mean | 0 | 3 (6.7) | 10 (22.2) | 4 (8.9) | 4 (8.9) | 3 (6.7) |