Table 3.

Score generated from each hospital.

Score for 2-day mortality
Variable	Hospital A	Hospital B	Hospital C	Overall
Age, year
< 60	0	0	0	0
60–80	4	13	11	8
≥ 80	4	20	12	11
Heart rate, /min
< 50	4	7	2	5
50–100	0	0	0	0
≥ 100	9	7	2	7
Respiration rate, /min
< 24	0	0	0	0
≥ 24	13	7	6	10
Temperature, °C
< 24	17	7	10	12
≥ 24	0	0	0	0
Blood pressure, mm Hg
Systolic
< 90	9	7	14	9
≥ 90	0	0	0	0
Diastolic
< 60	4	7	1	5
≥ 60	0	0	0	0
SpO2, %
< 90	17	13	14	15
90–95	4	7	5	5
≥ 95	0	0	0	0
Patient consciousness
Alert	0	0	0	0
Verbal	9	13	12	11
Painful	13	20	19	17
Unconsciousness	13	33	40	24

Variables were selected from parsimonious plot shown in Supplementary Fig. 2. Overall score was calculated with weighted score for each institutions. weights are 0.472 for Hospital A, 0.410 for Hospital B and 0.116 for Hospital C.