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Table 1 Clinical characteristics of the different subgroups according to gestational age and weight of the entire study population, of the group lost to follow up at age10 years and of the children with available data on weight increase during the first three months.

From: Catch-up growth up to ten years of age in children born very preterm or with very low birth weight

   Sex Mean Gestational Age Mean Birth-weight Multiple Birth Respiratory support >1 week Intra Cranial Haemorrhage Necrotising Entero Colitis Mean Hospital stay
  n (% males) (wk) (gram) (%) (%) (%) (%) days
<32 wks/AGA 445 53.1 29.7 1412 26.7 27.8 21.7 4.5 64
<32 wks/SGA 86 51.2 30.3 968 11.6 23.3 14.0 8.1 86
≥32 wks/SGA 222 49.5 34.5 1278 16.7 2.5 5.1 5.6 59
Lost to follow up at age 10 years
  243 49.2 31.1 1326 23.0 18.4 18.3 5.8 63
Weight Increase at 3 months
<3500 gr 257 45.3 32.1 1275 21.7 20.6 14.9 6.2 69
≥3500 gr 389 54.6 30.1 1349 21.2 19.3 16.3 4.6 62