Table 4.

Model fit statistics for 10% sample and all cases.

Model	Elective Admissions	Emergency Admissions
10% Sample
N	153,036	310,525
Hosmer-Lemeshow Goodness of fit test†	χ2 = 2.19; p-value = 0.97	χ2 = 4.36; p-value = 0.80
Discrimination (c-statistic)	0.792	0.786
All cases
N	1,535,267	3,105,249
Hosmer-Lemeshow Goodness of fit test†	χ2 = 7.37; p-value = 0.50	χ2 = 31.78; p-value = 0.0001
Discrimination (c-statistic)	0.786	0.787

†Eight degress of freedom