Table 1 Required numbers of children to be included and numbers of children included
22-26 weeks | 27-28 weeks | 29-30 weeks | 31 weeks | Total 22–31 weeks | 32-34 weeks | |
|---|---|---|---|---|---|---|
Expected % of all births (1) | 0.15-0.20 | 0.20 | 0.25-0.30 | 0.40 | 2.0 | |
Expected survival rates % (2) | 50 | 80-85 | 90-95 | 95 | 98-99 | |
Expected severe deficits among survivors % (3) | 20 | 15 | 5 | 3-4 | 1-2 | |
Number of children required for follow-up | 450 | 750 | 900 | 800 | 2900 | 1200 |
Number of live births to be included | 900 | 900 | 1000 | 850 | 3650 | 1200 |
Number of live births registered in EPIPAGE 2 | 1130 | 899 | 1265 | 932 | 4226 | 1340 |
Number of live births included in EPIPAGE 2 (parental agreement) | 1054 | 857 | 1190 | 862 | 3963 | 1206 |
Number of survivors included in the follow-up | 552 | 740 | 1146 | 836 | 3274 | 1193 |