Table 2.

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

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

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