TABLE 2

EOS and LOS as a Function of Maternal, Pregnancy, and Neonatal Characteristics

CharacteristicEOSLOSEOS and LOS
%n/NP%n/NP%n/NP
Antenatal corticosteroid therapy
 Yes7143/190831601/1908348/1908
 No856/685.5730204/685.40216/685.79
Preterm rupture of membranes
 Yes14139/98029282/980545/980
 No461/1645<.01a32526/1645.09119/1645<.01a
Maternal hemorrhage
 Yes722/31332100/31327/313
 No8181/2352.6830716/2352.59257/2352.84
Spontaneous preterm labor
 Yes647/78028221/780215/780
 No8153/1850.05a32586/1850.09349/1850.27
Type of pregnancy
 Singleton8145/183031564/1830350/1830
 Multiple758/835.3830252/835.742(14/835.10
Gender of child
 Male7104/141031440/1410331/1410
 Female899/1253.6130375/1253.47233/1253.46
Gestational age, wk
 23–281288/74151381/1741540/741
 29–30747/65733214/657214/657
 31–32568/1267<.01a17221/1267<.01a110/1267<.01a
Small for gestational age
 Yes49/2284398/228363/2435
 No8194/2435.03a29717/2435<.01a0.41/228.04a
Duration of central venous catheter use, d
 <11874/9600.55/960
 11–2021131/63817/638
 >2058577/994<.01a547/994<.01a
Cranial ultrasound abnormalities
 Major or moderate1061/60240240/602426/602
 Minor1038/39139154/391313/391
 No694/1607<.01a26422/1607<.01a225/1607<.01a