Years of birth | |||
---|---|---|---|
1979-80 | 1985-87 | 1991-92 | |
Survivors | 89 | 212 | 241 |
Survivors assessed | 89 | 211 | 237 |
Impairment: | |||
Cerebral palsy (% assessed) | 12 (13.5) | 14 (6.6) | 22 (9.3) |
Blind (% assessed) | 6 (6.7) | 9 (4.3) | 5 (2.1)2-150 |
Deaf (% assessed) | 3 (3.4) | 1 (0.5) | 2 (0.8) |
Impaired development (% assessed)2-151 | |||
Psychological test <−3 SD | 7 (7.9) | 13 (6.2) | 14 (5.9) |
Psychological test −3 SD to <−2 SD | 6 (6.7) | 9 (4.3) | 15 (6.3) |
Psychological test −2 SD to < −1 SD | 21 (23.6) | 30 (14.2) | 33 (13.9) |
Psychological test > = −1 SD | 55 (61.8) | 159 (75.4) | 1742-152 (73.4) |
↵2-150 1992-92 vs 1979-80 odds ratio 0.24, 95% confidence interval 0.06 to 0.93.
↵2-151 Mann-Whitney U test for ordered categories, 1979-80 vs1985-87 z = −2.25, P < 0.025; 1979-80 vs 1991-92, z = −1.93, not significant (NS), 1985-87 vs 1991-92 z = 0.4, NS.
↵2-152 Excludes one child difficult to assess, but probably normal.