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Table 2 Hosmer–Lemeshow goodness of fit test for P-Possum for postoperative complications

From: Development of a preoperative risk score on admission in surgical intermediate care unit in gastrointestinal cancer surgery

Deciles of risk (%)

Number of patients

Number of observed complications

Number of expected complications

Mean risk

O:E (95% CI)

X2HL statistic

0–10

40

4

3.92

0.10

1.02 (0.27–2.61)

0.00

10–20

44

4

5.22

0.12

0.77 (0.21–1.96)

0.32

20–30

24

4

3.26

0.14

1.23 (0.33–3.14)

0.19

30–40

32

6

4.98

0.16

1.20 (0.44–2.62)

0.25

40–50

47

11

9.24

0.20

1.19 (0.59–2.13)

0.42

50–60

27

6

6.30

0.23

0.95 (0.35–2.07)

0.02

60–70

29

6

7.87

0.27

0.76 (0.28–1.66)

0.61

70–80

35

10

11.29

0.32

0.89 (0.42–1.63)

0.22

80–90

33

14

13.80

0.42

1.01 (0.55–1.70)

0.01

90–100

30

20

19.12

0.64

1.05 (0.64–1.62)

0.11

0–100

341

85

85

 

1.00 (0.80–1.22)

2.14

  1. X2HL statistic = 2.144; df = 8; P = 0.976