Table 4. Independent prognosis factors in multivariate analysis for overall survival in SP, ‘pot−’ and ‘pot+’ group.

	P	Odd ratio	95% CI
SP
Parietal invasion	0.027	1.96	1.1–3.6
Lymph node involvement	0.007	2.02	1.2–3.3
Pot−
Lymph node involvement	0.002	3.64	1.6–8.1
Pot+
EGFR ‘mosaic’ positivity	0.535	1.27	0.6–2.7
EGFR ‘diffuse’ positivity	0.003	4.52	1.7–12.2
pT2-T3 invasion	0.038	2.19	1.0–4.6

95% CI=95% confidence interval.