Table 2.

Multivariate analysis of the relationship between PD-L1 expression and selected factors which have significance via univariate analysis by logistic regression SUVmax as an independent predictor of PD-L1 expression by multivariate analysis

	Factor	Odds ratio	95% confidence interval	P value
Overall (n= 374)	Sex	0.38	0.07–2.11	0.268
	Smoking	3.86	0.70–21.18	0.121
	Location	2.55	0.757–8.582	0.131
	SUVmax	1.14	1.08–1.20	0.000*
	TLG-P	0.98	0.96–1.01	0.109
	TLG-C	1.02	0.99–1.05	0.129
AC (n= 283)	Sex	0.28	0.02–3.33	0.313
	Smoking	4.70	0.39–55.97	0.221
	SUVmax	1.16	1.07–1.24	0.000*
	TLG-P	0.97	0.93–1.01	0.104
	TLG-C	1.03	0.99–1.07	0.147
SCC (n= 91)	Sex	0.18	0.01–7.21	0.358
	Smoking	3.40	0.30–38.09	0.320
	Location	1.97	0.57–6.79	0.281
	SUVmax	1.12	1.01–1.24	0.032*
	TLG-P	0.99	0.95–1.02	0.381
	TLG-C	1.01	0.98–1.05	0.407

AC and SCC represent adenocarcinoma and squamous cell carcinoma and *P < 0.05