Table 3

Characteristics of infants treated in 114 hospitals that participated in trial of quality improvement intervention for surfactant treatment of preterm infants, in the assessment year, 2001*

All infantsInfants born at participating hospitalsInfants transferred to participating hospital after birth
Intervention hospitals (n=57)Control hospitals (n=57)Intervention hospitals (n=57)Control hospitals (n=57)Intervention hospitals (n=57)Control hospitals (n=57)
Total No of infants treated in neonatal units3313272629112314402412
Mean (SD) birth weight (grams)936 (258)930 (259)932 (258)924 (262)967 (257)963 (238)
Mean (SD) gestational age (weeks)27 (2)27 (2)27 (2)27 (2)26 (2)27 (2)
Female (%)474647474740
Maternal ethnicity (%):
Black303430332842
Hispanic8178161217
White564457465235
Asian424242
Other232344
Small for gestational age (%)910101146
Multiple birth (%)272428261816
Given antenatal corticosteroids (%)757680823941
Delivered by caesarean section (%)595861595051
Apgar score ≤3 at 1 minute (%)333032294034
  • * Characteristics reported by study arm and birth location without regard to cluster.