Table 2 The Cox proportional hazards analysis of RFS according to the PD-L1 expression.

From: PD-L1 expression as a predictor of postoperative recurrence and the association between the PD-L1 expression and EGFR mutations in NSCLC

PD-L1 expression

N

Recurrence

N (%)

Unadjusted HR

(95% CI), P

Adjusted HRa

(95% CI), P

< 1%

78

4

(5.13)

Reference

Reference

1–49%

146

15

(10.3)

2.12

(0.70–6.39), 0.18

1.78

(0.59–5.43), 0.31

≥ 50%

56

20

(35.7)

8.96

(3.01–26.3), < 0.001

4.83

(1.51–15.5), 0.008

  1. RFS recurrence-free survival, PD-L1 programmed death-ligand 1, HR hazard ratio, CI confidence interval, EGFR epidermal growth factor receptor gene.
  2. aAdjusted by pathological stage, histological type, adjuvant chemotherapy and EGFR mutation status.
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