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 | 29 | 7 | 1 | 0 | 37 (51%) |
| Mild | 13 | 6 | 1 | 0 | 20 (27%) |
| Moderate | 1 | 1 | 6 | 0 | 8 (11%) |
| Severe | 0 | 0 | 0 | 8 | 8 (11%) |
| Disability at 5 | |||||
| Nil | 40 | 11 | 1 | 0 | 52 (71%) |
| Mild | 3 | 3 | 2 | 0 | 8 (11%) |
| Moderate | 0 | 0 | 4 | 1 | 5 (7%) |
| Severe | 0 | 0 | 1 | 7 | 8 (11%) |
| Disability at 8 | |||||
| Nil | 40 | 9 | 1 | 0 | 50 (68%) |
| Mild | 3 | 2 | 1 | 0 | 6 (8%) |
| Moderate | 0 | 3 | 7 | 1 | 10 (14%) |
| Severe | 0 | 0 | 0 | 7 | 7 (10%) |
| Total | 43 (59%) | 14 (19%) | 8 (11%) | 8 (11%) | 73 |
Only extremely low birthweight children with data at each age included (n = 73). Disability coded relative to psychological test manuals. Values in bold indicate those in the same category at each age.
At 2: κ = 0.474 (SE 0.092), t = 6.3, p< 0.0001; 49 (67%) correct, nine (12%) underestimated, 15 (21%) overestimated, McNemar's test p = 0.31 (not significant).
At 5: κ = 0.518 (SE 0.089), t = 7.0, p < 0.0001; 54 (74%) correct, 15 (21%) underestimated, four (5%) overestimated, McNemar's test, p = 0.019.
At 8: κ = 0.556 (SE 0.084), t = 7.7, p < 0.0001; 55 (75%) correct, 12 (16%) underestimated, six (8%) overestimated, McNemar's test p = 0.24 (not significant).