Table 9.

Comparison of test data and training data regarding age groups (mean values ± standard deviation)

Age groups (in years)	Length of stay (in days)		Mortality (in %)
	training	test	training	test
<  56	12.52 ± 0.20	12.49 ± 1.84	8.04 ± 0.57	8.36 ± 5.15
56–65	13.39 ± 0.12	13.38 ± 1.11	9.31 ± 0.33	9.28 ± 3.05
66–75	12.75 ± 0.06	12.75 ± 0.53	8.98 ± 0.17	8.94 ± 1.51
76–85	10.88 ± 0.05	10.87 ± 0.46	12.84 ± 0.46	12.82 ± 2.11
>  85	8.91 ± 0.28	9.02 ± 0.38	16.37 ± 0.22	16.37 ± 1.96