Table 5.

Risk factors for mortality, Cox proportional hazards regression analysis, univariate analysis

Risk factor	Regression coefficient	p value	HR (95% CI)
Complication	0.17	0.52	1.18 (0.70–2.00)
Charlson index (ref. 0)
1	0.28	0.46	1.32 (0.63–2.79)
2	0.82	0.02	2.27 (1.18–4.83)
≥3	1.29	<0.001	3.62 (1.98–6.64)
Age (ref. 60–65)
66–75	0.60	0.34	1.82 (0.53–6.25)
76–85	1.14	0.06	3.13 (0.96–10.18)
≥86	1.46	0.02	4.30 (1.33–13.91)
Male sex	0.36	0.08	1.44 (0.96–2.15)

HR hazard ratio, CI confidence interval