Table V.

Multivariate Cox regression survival analysis of all 123 cases included in the study

Clinical factors	Overall survival HR (95% CI)	P-value
Age	1.028 (1.005–1.05)	0.014
Gender	1.081 (0.696–1.677)	0.730
Perineural infiltrations	2.324 (1.278–4.226)	0.006
DGE	1.261 (0.774–2.054)	0.352
Postoperative fistula	3.588 (1.127–11.424)	0.09
Postoperative fistula grade	0.280 (0.08–0.887)	0.118
Postoperative haemorrhage	3.045 (1.629–5.694)	< 0.001

CI – confidence interval, HR – hazard ratio, SD – standard deviation.