Table 2.

Discrimination and calibration for predicting exacerbation within 2 days (validation cohort).

	AUC	Calibration intercept	Calibration slope
XGBoost	0.81 (0.78, 0.84)	0.32 (0.15, 0.48)	0.56 (0.5, 0.61)
Logistic regression	0.88 (0.86, 0.90)	0.75 (0.6, 0.90)	1.02 (0.93, 1.10)

XGBoost gradient boosted decision trees, AUC area under the receiver operating characteristics curve.