Table 1

Predictors of surfactant use in cohort 1 (n = 3,633)*

Odds Ratio

95% CI

p-value


PATIENT-LEVEL PREDICTORS*


Gestational age


30 weeks (n = 621)

Reference


31 weeks (n = 620)

0.73

0.57-0.95

0.019


32 weeks (n = 747)

0.68

0.53-0.87

0.002


33 weeks (n = 715)

0.58

0.45-0.75

<0.001


34 weeks (n = 930)

0.69

0.55-0.88

0.003


Race†


Non-white (n = 840)

Reference


White (n = 2,571)

1.22

1.02-1.47

0.03


Gender


Female (n = 1,535)

Reference


Male (n = 2,098)

1.34

1.15-1.57

<0.001


Age at admission


Day of life 0 (n = 3,107)

Reference


Day of life 1 (n = 526)

1.11

0.89-1.38

0.34


Mode of respiratory support (first 48 hrs)


NCPAP (n = 672)

Reference


Mechanical ventilation (n = 2,961)

54.99

35.86-84.35

<0.001



HOSPITAL-LEVEL PREDICTORS††


Research involvement


Top 10 hospital based on NIH total awards to children's hospitals

1.48

0.98-2.25

0.065


Surgical volume


≥ 29% (median) of admissions to the NICU classified as surgical

1.58

0.79-3.16

0.193


Payer mix


≥ 45% (median) of admissions to the hospital paid by Medicaid

0.80

0.40-1.61

0.532


Patient volume


≥ 45 (median) Annual ELBW Admissions

1.80

1.02-3.19

0.042


NCPAP = nasal continuous positive airway pressure, NIH = National Institutes of Health; NICU = neonatal intensive care unit; ELBW = extremely low birth weight

*Model includes patient-level variables listed in the table plus hospital fixed effects

†Model includes a term for missing race (n = 222)

††Model includes patient-level variables listed in the table plus hospital characteristics added individually

Kaplan et al. BMC Health Services Research 2011 11:22   doi:10.1186/1472-6963-11-22

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