Table 3. Independent factors for distinguishing PD-L1 expression resulting from multivariate logistic regression analysis and their prediction efficacy.

Group	Characteristic	P&	P#	OR# (95% CI)	AUC
PD-L1 TPS <1% or ≥1%	Lung metastasis	0.002	0.003	0.14 (0.06–0.51)	0.673
PD-L1 TPS <50% or ≥50%	Lung metastasis	0.010	0.024	0.22 (0.03–0.92)	0.626

^&, unadjusted P value; ^#, the P value was calculated by multivariable logistic regression analysis which adjusted for age, gender, smoking history and driver gene mutation status. P<0.05 was considered as statistically significant. PD-L1 TPS, tumor proportion scores of PD-L1; OR, odd ratio; CI, confidence interval; AUC, area under the receiver operating characteristic curve.