Table 2.
Impairment and neonatal characteristics of the sample
| Characteristic | Survivors (max 2749) %a (n) | Deaths (max 436) %a (n) |
|---|---|---|
| Primary CP type | ||
| Spastic hemiplegia | 37.3 (1021) | 12.0 (52) |
| Spastic diplegia | 36.6 (1001) | 16.9 (73) |
| Spastic quadriplegia | 10.3 (282) | 53.1 (230) |
| Ataxia | 7.7 (210) | 2.8 (12) |
| Dyskinesia | 7.1 (193) | 12.9 (56) |
| Hypotonic CP | 1.1 (31) | 2.3 (10) |
| Datum missing % | 0.4 (11) | 0.7 (3) |
| Mixed spastic quadriplegia+dyskinetic | 2.2 (60) | 8.9 (17) |
| Estimate of cognitive ability | ||
| Normal/Borderline | 61.2 (1658) | 11.1 (48) |
| Mild | 18.0 (487) | 17.4 (75) |
| Moderate | 9.2 (248) | 9.5 (41) |
| Severe/Profound | 11.7 (318) | 62.0 (268) |
| Datum missing% | 1.4 (38) | 0.9 (4) |
| Epilepsy | 29.3 (784) | 69.0 (294) |
| Datum missing% | 2.6 (72) | 2.3 (10) |
| Blind | 6.8 (181) | 30.3 (126) |
| Datum missing% | 3.0 (84) | 4.6 (20) |
| Deaf | 3.0 (79) | 9.1 (36) |
| Datum missing% | 3.1 (99) | 8.9 (39) |
| Decade of birth | ||
| 1956–60 | 4.4 (121) | 9.6 (42) |
| 1961–70 | 12.6 (347) | 24.8 (108) |
| 1971–80 | 14.5 (398) | 17.2 (75) |
| 1981–90 | 19.0 (522) | 23.6 (103) |
| 1991–2000 | 24.6 (677) | 18.2 (79) |
| 2001–2011 | 24.9 (684) | 7.7 (29) |
| Male | 56.5 (1552) | 58.5 (255) |
| Birthweight | ||
| > =2500 g | 66.0 (1470) | 75.5 (308) |
| 1500-2499 g | 19.5 (434) | 19.1 (78) |
| < 1500 g | 14.5 (324) | 5.4 (22) |
| Datum missing %2 | 18.9 (521) | 6.4 (28) |
| Gestation of birth | ||
| > =37 weeks | 66.3 (1732) | 79.6 (328) |
| 32–36 weeks | 15.5 (405) | 13.1 (54) |
| < 32 weeks | 18.1 (473) | 7.3 (30) |
| Datum missing % | 5.1 (139) | 5.5 (24) |
| Overall Disability score | ||
| 1–5 | 70.9 (1871) | 14.4 (59) |
| 6–8 | 17.3 (456) | 21.5 (88) |
| 9–12 | 11.8 (311) | 64.1 (262) |
| Datum missing % | 4.0 (111) | 6.2 (27) |
a Proportion of those for whom that datum was not missing