Colorectal cancer surgery in selected nonagenarians is relatively safe and it is associated with a good long-term survival: an observational study

Table 6 Multivariate analysis (Cox regression) of risk factors associated with a long-term survival

	B	SE	Wald	p	HR	95%CI for HR
S-MPM	0.381	0.401	0.906	0.341	1.46	0.67–3.21
Emergency surgery	0.454	0.468	0.939	0.333	1.57	0.63–3.94
TNM stage	0.963	0.436	4.886	0.027	2.62	1.12–6.15

B regression coefficient, SE standard error, Wald test statistic, HR hazard ratio, CI confident interval

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