Table 6

Gestational age specific cerebral palsy (CP) prevalence rates in surviving co-twin of a fetal (group 1) or infant (group 2) death per 1000 infant survivors

Survivor of a fetal death co-twin (group 1)Survivor of a co-twin who died in infancy (group 2)
Gestational age (weeks)No with CPNo of respondersCP rate (per 1000 survivors)95% CINo with CPNo of respondersCP rate (per 1000 survivors)95% CI
Note: Gestational age specific cerebral palsy prevalence in singletons in the NE England Register (1985–1989) were: <32 weeks 62.1 (95% CI 39 to 93); ≥32 weeks 1.7 (95% CI 1.3 to 2.0) per 1000 neonatal survivors (P Drummond, personal communication).
NA, Not applicable.
Like-sex twins
    <3219111.13 to 4821343302.3172 to 461
    ≥32761114.847 to 22236149.210 to 137
Total870114.351 to 21316104153.884 to 223
Unlike-sex twins
    <3212500.013 to 987211181.823 to 519
    ≥32020NA015NA
Total12245.41 to 22822676.99 to 251