Table 5. Independent prognosis factors in multivariate analysis for local recurrence and metastasis occurrence, in SP and ‘pot+’ group.

Groups	Local recurrence	P	Odd ratio	95% CI
SP	Lymph node involvement	0.005	2.68	1.3–5.3
Pot+	EGFR ‘mosaic’ positivity	0.161	2.45	0.70–8.59
	EGFR ‘diffuse’ positivity	0.006	9.62	1.90–48.76
	Metastasis occurrence
SP	Lymph node involvement	<0.001	4.08	2.3–7.2
Pot+	Lymph node involvement	0.001	3.08	1.6–6.1

95% CI=95% confidence interval.