Abbreviation	Definition
AuROC	Area under the receiver operating characteristic curve
BPD	Bronchopulmonary dysplasia
CI	Confidence interval
CITL	Calibration-in-the-large
E:O	Expected-to-observed ratio
LR+	Positive likelihood ratio
LR−	Negative likelihood ratio
NEC	Necrotizing enterocolitis
NICU	Neonatal intensive care unit
NPV	Negative predictive value
PPV	Positive predictive value
RDS	Respiratory distress syndrome
RMSE	Root mean squared error
ROC	Receiver operating characteristic
ROP	Retinopathy of prematurity
SD	Standard deviation