Table 3.

In-hospital mortality in the development and validation cohorts.

	Development		Validation		Death
Quintile of risk	n	Mortality (range)	N	Mortality (range)	Observed	Expected
1	3175	30% (28 – 33%)	3484	30% (28 – 33%)	1014	1056
2	619	35% (34 – 35%)	626	35% (34 – 35%)	236	217
3	1919	38% (37 – 41%)	2096	38% (37 – 41%)	785	793
4	1619	43% (42 – 47%)	1729	43% (41 – 47%)	771	749
5	1833	57% (48 – 81%)	1958	57% (48 – 84%)	1096	1106
Point score
Low (<6)	3175	31% (23 – 33%)	3484	31% (28 – 33%)	1014	1055
Medium (6–10)	4489	40% (38 – 55%)	4817	40% (40 – 55%)	2492	2456
High (>10)	1501	59% (51 – 81%)	1592	58% (56 – 84%)	910	926