TABLE 3

Baseline Characteristics by Study Group

Collaborative QINICU QINonparticipantsP
n hospitals203144
 Median hospital volume of eligible patients742828<.0001
 Hospital level of care,a %
  IIA/IIB2067.011
  IIIA/IIIB508786
  IIIC3067
 No. of NICU beds (SD)43 (21)25 (12)25 (14)<.0001
 No. of live births (SD)a4569 (2009)2902 (1164)2862 (1098)<.0001
 Teaching hospitals, %211414.74
n patients162410091589
 Birth weight, g (SD)1099 (303)1092 (300)1092 (305).75
 Gestational age, d (SD)202 (20)202 (20)201 (20).46
 Maternal age (SD)29 (7)29 (7)30 (7).30
 No prenatal care, %2.03.52.7.079
 Race/ethnicity, %
  White29.929.223.1<.0001
  Hispanic40.442.550.4
  Black13.513.613.7
  Asian13.113.49.8
  American Indian0.40.40.1
  Other2.60.82.8
 Multiple gestation, %30.026.526.3.034
 Cesarean delivery, %76.876.474.9.42
 Hypothermia, %39.237.542.4.034
 Hyperthermia, %5.94.53.4.0036
 CPAP in DR, %56.745.538.2<.0001
 CPAP, not intubated in DR, %31.031.024.7<.0001
 Surfactant in DR, %36.618.817.6<.0001
 Endotracheal intubation in DR, %53.343.843.3<.0001
  • DR, delivery room

  • a Hospital level of care is denoted based on the categorization from the American Academy of Pediatrics during the study period.41 Number of live births were all births at the hospital during 2010.