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Table 1 Comparison of obstetrical and neonatal characteristics between the La Réunion Observatoire de la Grande Prématurité (OGP) 2008–2013 cohort and the EPIPAGE-2 2011 cohort

From: Mortality and severe morbidity of very preterm infants: comparison of two French cohort studies

  OGP
(n = 1272)
EPIPAGE 2
(n = 3669)
P values
n % or mean ± SE n % or mean ± SE
Obstetrical characteristics
 Maternal age (years) 1115 28.2 ± 0.2 3669 29.7 ± 0.1 <  0.001
 Maternal hypertension 290 29.3 849 24.6 0.003
 Maternal diabetes 132 11.6 308 9.4 0.030
 Premature prolonged rupture of membranes 204 22.3 1336 36.3 <  0.001
 Antenatal steroid therapy 1022 89.7 2989 83.4 <  0.001
 Multiple birth 299 23.5 1202 32.7 <  0.001
 Caesarean delivery 709 60.8 2346 65.8 0.002
Neonatal characteristics
 Gestational age, weeks (WG) 1272 28.6 ± 0.06 3669 28.5 ± 0.03 0.201
  24–26 222 17.5 791 21.6 0.008
  27–28 307 24.1 842 22.9  
  29–31 743 58.4 2036 55.5  
 Birthweight (grams) 1271 1174.7 ± 9.6 3669 1194.2 ± 4.8 0.098
  < 750 152 11.9 423 10.0 0.177
  750–1000 290 22.8 875 22.0  
  1000–1250 302 23.8 890 25.3  
  ≥ 1250 527 41.5 1481 42.7  
 Small for gestational agea 180 14.2 467 12.9 0.253
 Male sex 686 53.9 1933 52.7 0.446
 Outborn status 76 6.0 533 14.5 <  0.001
 Apgar score at 5 min < 7 69 7.4 646 18.0 <  0.001
 Surfactant therapy 678 54.0 2427 65.1 <  0.001
  1. aBirthweight <3rd percentile (French AUDIPOG growth charts)