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Table 3 Hosmer–Lemeshow goodness of fit test for ACS NSQIP 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

34

1

2.12

0.06

0.47 (0.01–2.63)

0.63

10–20

35

2

3.00

0.09

0.67 (0.07–2.41)

0.37

20–30

33

2

3.62

0.11

0.55 (0.06–1.99)

0.82

30–40

34

8

4.98

0.15

1.61 (0.69–3.17)

2.15

40–50

36

3

6.29

0.17

0.48 (0.10–1.39)

2.09

50–60

32

10

6.71

0.21

1.49 (0.71–2.74)

2.04

60–70

34

15

8.72

0.26

1.72 (0.96–2.84)

6.08

70–80

35

10

11.13

0.32

0.90 (0.43–1.65)

0.17

80–90

33

9

14.69

0.45

0.61 (0.28–1.16)

3.98

90–100

34

25

23.73

0.70

1.05 (0.68–1.56)

0.22

0–100

340

85

85

 

1.00 (0.80–1.22)

18.54

  1. X2HL statistic = 18.540; df = 8; P = 0.018