Table 5.

Actual mortality rate and mortality rate predicted by CABG risk prediction model.

Group	Total number	Number of deaths	Actual mortality rate	Predicted mortality rate	Predicted mortality rate (95% CI)	AUC	H-L test (χ2)	H-L test (P value)
A	1516	0	0	0	0	0	0	0
B	563	3	0.33	0.96 ± 0.78	(0.82, 0.87)	0.521	0.753	0.34
C	368	5	0.20	3.27 ± 0.83	(3.16, 3.89)	0.763	4.621	0.032
D	187	17	0.29	8.78 ± 2.19	(8.63, 8.98)	0.362	8.373	0.165
Total	2364	25	0.68	2.67 ± 1.82	(2.87, 2.98)	0.732