Table 4. Mortality by score.

Model A
	Derivation Cohort	Validation Cohort
Score	Mortality (%)	Mortality (%)
0	4	19
1	40	29
2	63	53
Model B
	Derivation Cohort	Validation Cohort
Score	Mortality (%)	Mortality (%)
0	16	0
1	37	20
2	27	41
3	62	71

Differences between means (p.) of category scores.

Model A, Derivation Cohort: 0 vs. 1: 0.04; 0 vs. 2: < 0.0001; 1 vs. 2: 0.04.

Model A, Validation Cohort: 0 vs. 1: 0.42; 0 vs. 2: 0.01; 1 vs. 2: 0.02.

Model B, Derivation Cohort: 0 vs. 1: 0.13; 0 vs. 2: 0.43; 0 vs. 3: 0.001; 1 vs. 2: 0,47; 1 vs. 3: 0.04; 2 vs. 3: 0.01.

Model B, Validation Cohort: 0 vs. 1: 0.09; 0 vs. 2: 0.0002; 0 vs 3: < 0.0001; 1 vs. 2: 0.02; 1 vs. 3: < 0.0001; 2 vs. 3: 0.01.