Table 2.

AUROCs with 95% CI yielded by the logistic regression (LR) and random forest (RF) models in the different left-out ICUs (sorted by sample size). Prevalence is the fraction of patients who experience in-ICU mortality per ICU.

ICU	N patients	Prevalence in-ICU mortality	LR AUROC [95% CI]	RF AUROC [95% CI]
V	21	0.33	0.92 [0.87,0.97]	0.90 [0.79,0.98]
X	39	0.41	0.71 [0.55,0.85]	0.63 [0.49,0.77]
L	44	0.20	0.93 [0.87,0.98]	0.95 [0.90,0.99]
R	51	0.31	0.76 [0.59,0.89]	0.77 [0.66,0.87]
Y	53	0.13	0.88 [0.75,0.99]	0.90 [0.84,0.94]
P	53	0.25	0.75 [0.61,0.88]	0.71 [0.55,0.86]
W	54	0.07	0.85 [0.57,1.00]	0.92 [0.85,0.98]
H	71	0.14	0.91 [0.85,0.96]	0.84 [0.73,0.94]
B	79	0.30	0.85 [0.74,0.94]	0.88 [0.79,0.95]
S	81	0.35	0.87 [0.80,0.93]	0.86 [0.78,0.92]
K	107	0.11	0.90 [0.83,0.95]	0.76 [0.59,0.89]
N	109	0.18	0.91 [0.82,0.98]	0.91 [0.84,0.97]
E	110	0.19	0.90 [0.83,0.96]	0.85 [0.74,0.94]
U	113	0.18	0.85 [0.79,0.90]	0.89 [0.83,0.94]
D	114	0.23	0.94 [0.90,0.98]	0.97 [0.94,0.99]
J	134	0.14	0.87 [0.82,0.92]	0.90 [0.81,0.96]
T	153	0.29	0.88 [0.81,0.92]	0.90 [0.84,0.95]
O	177	0.18	0.77 [0.68,0.86]	0.74 [0.66,0.81]
I	193	0.33	0.89 [0.84,0.93]	0.89 [0.85,0.93]
M	230	0.10	0.85 [0.79,0.90]	0.84 [0.76,0.90]
Q	234	0.14	0.92 [0.88,0.97]	0.89 [0.83,0.94]
F	240	0.30	0.85 [0.81,0.90]	0.87 [0.83,0.91]
G	242	0.18	0.87 [0.82,0.92]	0.87 [0.82,0.93]
A	248	0.25	0.91 [0.87,0.95]	0.91 [0.86,0.95]
C	272	0.16	0.86 [0.79,0.91]	0.87 [0.81,0.92]