Table 3

Comparison of outcomes at 11 years for babies born at 22–25 weeks’ gestation in England in the two EPICure cohorts: results of imputation and a sensitivity analysis including maternal age at delivery in the imputation model (see online supplemental table S8 for variables and missingness)

Original resultsImputed results*
1995
N=176
2006
N=112
1995
N=260
2006
N=584
2006†
N=584
% (95% CI)% (95% CI)% (95% CI)% (95% CI)% (95% CI)
Overall disability
 No/mild49% (42% to 57%)53% (43% to 62%)45% (38% to 52%)45% (39% to 51%)44% (37% to 50%)
 Moderate32% (26% to 40%)21% (15% to 30%)34% (27% to 41%)23% (18% to 28%)24% (15% to 33%)
 Severe18% (13% to 25%)26% (19% to 35%)21% (15% to 27%)32% (27% to 37%)33% (24% to 41%)
Cognitive disability
 No/mild59% (52% to 66%)63% (53% to 71%)53% (47% to 60%)55% (48% to 62%)55% (46% to 64%)
 Moderate26% (20% to 33%)13% (8% to 20%)28% (21% to 34%)17% (10% to 24%)17% (9% to 24%)
 Severe15% (11% to 22%)25% (18% to 34%)19% (13% to 25%)28% (21% to 35%)29% (22% to 36%)
  • *20 imputed datasets were used.

  • †After adding maternal age at delivery in the imputation models.