Table 3.

Preoperative variables' effect on mortality

	Probability of survival at 5 years, %		Univariable Cox regression			Multivariable Cox regression, significant covariates in model
			HR	95% CI	p	HR	95% CI	p
Age/10			1.99	1.70–2.33	< 0.001	2.01	1.63–2.46	< 0.001
	Male	Female
Sex (male)	65	75	1.36	1.10–1.69	0.005	1.37	1.03–1.82	0.031
	Yes	No
Hypertension	68	70	1.10	0.89–1.37	0.382	Not included
Diabetes	66	69	1.18	0.92–1.53	0.197	Not included
Stroke	56	71	1.54	1.17–2.04	0.002	ns
Heart disease	57	73	1.66	1.32–2.09	< 0.001	1.59	1.19–2.12	0.002
Claudication	54	72	1.91	0.60–6.02	0.271	Not included
Number of comorbidities			1.22	1.11–1.36	< 0.001	ns
	Yes	No
Gait scale ≥ 5	56	79	2.20	1.75–2.77	< 0.001	1.78	1.34–2.36	< 0.001
Balance scale ≥ 4	57	77	1.98	1.54–2.53	< 0.001	ns
Continence scale ≥ 4	60	77	1.87	1.49–2.36	< 0.001	ns
mRS ≥ 3	58	80	2.23	1.73–2.87	< 0.001	ns
MMSE score/5			0.67	0.60–0.75	< 0.001	0.77	0.68–0.88	< 0.001

MMSE mini-mental state examination, mRS modified Rankin Scale