TABLE 1

Characteristics of Survivors Seen at the Follow-up Visit at 5 Years and Infants Alive But Lost to Follow-up

CharacteristicMedical ExaminationCognitive Assessment
Infants With Known Cerebral Palsy Status (n = 1769)Infants Alive But Lost to Follow-up (n = 508)PInfants With Known Cognitive Score (n = 1495)Infants Alive But Lost to Follow-up (n = 782)P
%n/N%n/N%n/N%n/N
EOS7131/1769629/508.197109/1495751/782.49
LOS31557/176931155/508.7631467/149531245/782.97
Gestational age, wk<.01a.01a
 23–2825436/17691893/50824365/149521164/782
 29–3026467/176926133/50827410/149524190/782
 31–3249866/176955282/50848(720/149555428/782
Cranial ultrasound abnormalities.53.08
 Major or moderate19340/17501993/49618266/148122167/765
 Minor16275/17501469/49616234/148114110/765
 No651135/175067334/49666981/148164488/765
Antenatal corticosteroid therapy751305/173974361/488.63761110/146973556/758.25
Gender of child.17.16
 Male51907/176955278/50851762/149554423/782
 Female49862/176945230/50849733/149546359/782
Small for gestational age8138/1769628/508.088113/1495753/782.50
Maternal level of education<.01a<.01a
 University31538/17222074/37632476/146822136/630
 High school22371/17221661/37622321/146818111/630
 Middle school42715/172254201/37641595/146851321/630
 Primary school or no school698/17221140/376576/14681062/630