Comparisons of assessment of disability earlier in childhood with that at 14 years of age
| Disability at 14 | Total | ||||
|---|---|---|---|---|---|
| Nil | Mild | Moderate | Severe | ||
| Disability at 2 | |||||
| Nil | 20 | 9 | 0 | 0 | 29 (40%) |
| Mild | 12 | 8 | 3 | 1 | 24 (33%) |
| Moderate | 4 | 0 | 6 | 0 | 10 (14%) |
| Severe | 0 | 0 | 2 | 8 | 10 (14%) |
| Disability at 5 | |||||
| Nil | 26 | 10 | 1 | 0 | 37 (51%) |
| Mild | 9 | 7 | 4 | 0 | 20 (27%) |
| Moderate | 1 | 0 | 5 | 0 | 6 (8%) |
| Severe | 0 | 0 | 1 | 9 | 10 (14%) |
| Disability at 8 | |||||
| Nil | 25 | 7 | 0 | 0 | 32 (44%) |
| Mild | 10 | 9 | 2 | 0 | 21 (29%) |
| Moderate | 1 | 1 | 8 | 0 | 10 (14%) |
| Severe | 0 | 0 | 1 | 9 | 10 (14%) |
| Total | 36 (49%) | 17 (23%) | 11 (15%) | 9 (12%) | 73 |
Only extremely low birthweight children with data at each age included (n = 73). Disability coded relative to psychological test scores for normal birthweight controls. Values in bold indicate those in the same category at each age.
At 2: κ = 0.385 (SE 0.087), t = 5.4, p < 0.0001; 42 (58%) correct, 13 (18%) underestimated, 18 (25%) overestimated, McNemar's test p = 0.47 (not significant).
At 5: κ = 0.458 (SE 0.088), t = 6.2, p < 0.0001; 47 (64%) correct, 15 (21%) underestimated, 11 (15%) overestimated, McNemar's test, p = 0.56 (not significant).
At 8: κ = 0.556 (SE 0.082), t = 7.7, p < 0.0001; 51 (70%) correct, nine (12%) underestimated, 13 (18%) overestimated, McNemar's test p = 0.52 (not significant).