Comparisons of assessment of disability earlier in childhood with that at 14 years of age
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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.
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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).
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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).
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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).
