TABLE 4

NICU Admission by Absolute and Relative Criteria

VariableCriteria for Identifiable Cause for AdmissionAdmitted Without Identified Cause, %
Mean ± SDRangeP
Absolute criteria for NICU admissionIdentified intensive care service need (n = 17 327)29.4 ± 23.00–84.3<.001
Relative criteria for NICU admissionIdentified intensive care service need or ≤2500 g (n = 17 604)24.2 ± 18.60–69.2<.001
Identified intensive care service need or maternal chorioamnionitis or recreational drug use (n = 13 558)13.5 ± 21.90–70.1<.001
Identified intensive care service need or ≤2500 g or maternal chorioamnionitis or recreational drug use (n = 14 472)10.8 ± 17.80–59.0<.001