TABLE 1

Characteristics of Infants Included and Excluded From the Cohort and Infants With Missing Data for the Outcome of Interest

CharacteristicInfants With Complete Data (N = 1057)Excluded Infants (N = 104)aInfants With Missing Data for the Outcome
Died (N = 126)No Exam or Follow-up Data (N = 146)
Prenatal care93919487
Antenatal steroids81617877
Maternal hypertension27182219
Vaginal delivery38495245
Duration of rupture of membranes, h41 (136)15 (49)24 (59)52 (151)
Male gender45575355
Ethnicity
    Black45504650
    White39283337
    Other16222113
Gestational age, wk26.2 (2)24.6 (2)25 (1.7)26.3 (2.2)
Outborn614107
5-min Apgar score of <620423319
Multiple birth21272719
Birth weight, g785 (131)660 (135)693 (135)795 (148)
FGR-10b1.24 (0.3)1.26 (0.3)1.25 (0.2)1.23 (0.3)
Respiratory distress syndrome971009796
Pneumothorax5262312
Day of first feeding7.6 (6.5)NA9.2 (8.1)8.1 (7.3)
HM (yes)7507663
  • Data are column percentages of infants with the attribute or the mean (SD) for infants with the attribute. NA indicates not applicable.

  • a Excluded infants were those who were never enterally fed.

  • b FGR-10 indicates birth weight/10th percentile of birth weight for gestational age according to gender (using growth curves described by Alexander et a124).