Table 2.

Area under the curve (AUC), accuracy, sensitivity, specificity, and Brier scores of predicting AKI onset using data from individual days and all 4 days before AKI onset, (A) without and (B) with comorbidities and demographic data from the Montefiore health system test dataset. (C) performance indices of the Stony Brook Hospital testing dataset.

(A) Without comorbidities and demographic data
	AUC	Accuracy	Sensitivity	Specificity	Brier Score
Day −3	0.75 ± 0.01	65.05 ± 1.92%	0.75 ± 0.03	0.61 ± 0.03	0.21 ± 0.01
Day −2	0.82 ± 0.01	73.94 ± 1.22%	0.57 ± 0.05	0.87 ± 0.01	0.17 ± 0.01
Day −1	0.75 ± 0.01	69.47 ± 0.33%	0.64 ± 0.02	0.78 ± 0.03	0.20 ± 0.01
Day 0	0.79 ± 0.01	66.61 ± 0.03%	0.64 ± 0.03	0.81 ± 0.03	0.19 ± 0.01
All time points	0.956 ± 0.005	87.98 ± 1.75%	0.88 ± 0.05	0.87 ± 0.05	0.09 ± 0.01

(B) With comorbidities and demographic data
Day −3	0.77 ± 0.01	69.10 ± 1.24%	0.68 ± 0.03	0.70 ± 0.02	0.20 ± 0.01
Day −2	0.84 ± 0.01	76.46 ± 0.43%	0.68 ± 0.03	0.82 ± 0.03	0.17 ± 0.01
Day −1	0.80 ± 0.01	70.53 ± 1.29%	0.65 ± 0.04	0.79 ± 0.04	0.19 ± 0.01
Day 0	0.83 ± 0.01	65.45 ± 1.05%	0.63 ± 0.02	0.82 ± 0.01	0.19 ± 0.01
All time points	0.965 ± 0.003	89.57 ± 1.64%	0.95 ± 0.03	0.84 ± 0.05	0.08 ± 0.01

(C) Stony Brook Hospital data prediction performance
All time points	0.83 ± 0.03	78.93 ± 2.74%	0.73 ± 0.09	0.80 ± 0.05	0.16 ± 0.01
All time points + comorbidities and demographics	0.86 ± 0.01	83.66 ± 2.53%	0.66 ± 0.10	0.89 ± 0.03	0.12 ± 0.01