Table 8.

Influence of the Irradiation Range, Surgical Bed Volume and Volume of the Elective Area in N Stages on OS, CSS, RFS and LRFS

Nodal Status		N0		N 1–3
Test Log-Rank		χ2 Test-Value	p-value	χ2 Test-Value	p-value
Irradiation area vs:	OS	−4.409	0.22	−5.023	0.17
	CSS	−8.608	0.035	−6.808	0.078
	RFS	−8.979	0.029	−4.263	0.234
	LRFS	−6.811	0.078	−0.246	0.969
Tumor bed volume vs:	OS	−2.474	0.480	−2.896	0.408
	CSS	−3.983	0.263	−1.280	0.734
	RFS	−5.517	0.138	−1.091	0.779
	LRFS	−6.298	0.098	−2.521	0.472
Elective area volume vs:	OS	−3.766	0.152	−0.194	0.979
	CSS	−2.247	0.325	−0.716	0.870
	RFS	−2.464	0.292	−0.600	0.897
	LRFS	−3.831	0.147	−3.348	0.341

Note: Statistically significant results in bold.

Abbreviations: p, significance level; χ2, chi square test; OS, overall survival; CSS, cancer-specific survival; RFS, relapse-free survival; LRFS, local relapse-free survival; N, nodes.