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Table 3 Outcome trend over the observation period

From: Stratification of the severity of critically ill patients with classification trees

 

All

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

p-value b

n

2684

176

191

201

223

279

297

303

319

337

358

-----

MORT (%)

31.4

35.4

33.7

39.1

35.0

28.4

32.9

33.0

28.6

27.7

23.3

0.112

DEV (%)

70.0

70.8

61.7

69.0

70.9

72.4

68.9

75.4

66.8

70.4

72.6

0.146

APACHE II a

18 (7-41)

21 (7-41)

19 (8-41)

19 (6-34)

17 (6-36)

14 (5-30)

14 (6-30)

15 (6-35)

16 (7-38)

17 (6-36)

15 (7-34)

0.361

SAPS II a

15 (6-47)

15 (6-47)

17 (5-41)

12 (4-31)

13 (3-35)

13 (4-27)

13 (4-31)

15 (5-39)

17 (6-37)

17 (6-37)

13 (5-31)

0.415

MPM II-24 a

17 (7-43)

17 (7-43)

16 (6-35)

14 (6-29)

16 (6-35)

14 (6-32)

13 (6-34)

18 (6-39)

18 (6-40)

17 (7-36)

14 (6-34)

0.389

  1. MORT: Hospital mortality; DEV: Development set percentage (a): Median (Interquartile range) pb: Determined by χ2 test for percentages or Kruskal-Wallis test for comparison of medians.