Table 1 Clinico-pathologic variables and immunoreactivity status of PD-1 and PD-L1 in 99 NPC patients.

From: PD-L1 predicts poor prognosis for nasopharyngeal carcinoma irrespective of PD-1 and EBV-DNA load

Variables

n

PD-1 Positive

P value1

PD-L1 High2

P value1

Gender

Male

68

30 (44. 1%)

0.923

44 (64.7%)

0.349

Ā 

Female

31

14 (45.2%)

Ā 

17 (54.8%)

Ā 

Age (years)

<50

60

27 (45.0%)

0.890

35 (58.3%)

0.405

Ā 

≄50

39

17 (43.6%)

Ā 

26 (66.7%)

Ā 

Smoking status

Smoker or ex-smoker

34

15 (44.1%)

0.962

20 (58.8%)

0.679

Ā 

Non-smoker

65

29 (44.6%)

Ā 

41 (63.1%)

Ā 

Family history

Yes

25

14 (56.0%)

0.179

13 (52.0%)

0.253

Ā 

No

74

30 (40.5%)

Ā 

48 (64.9%)

Ā 

Tumour size

rT1-3

71

33 (46.5%)

0.517

43 (60.6%)

0.732

Ā 

rT4

28

11 (39.3%)

Ā 

18 (64.3%)

Ā 

Nodal status

N0-1

54

22 (40.7%)

0.417

33 (61.1%)

0.910

Ā 

N2-3

45

22 (48.9%)

Ā 

28 (62.2%)

Ā 

Clinical stage3

I-III

65

29 (44.6%)

0.962

38 (58.5%)

0.372

Ā 

IV

34

15 (44.1%)

Ā 

23 (67.6%)

Ā 

GTVnx (mm3)2

<29.6

45

22 (48.9%)

0.417

28 (62.2%)

0.910

Ā 

≄29.6

54

22 (40.7%)

Ā 

33 (61.1%)

Ā 

EBV-DNA load

Undetectable

22

10 (45.5%)

0.914

12 (54.5%)

0.439

Ā 

Detectable

77

34 (44.2%)

Ā 

49 (63.6%)

Ā 

PD-1 positivity

Negative

55

Ā Ā 

31 (56.4%)

0.230

Ā 

Positive

44

Ā Ā 

30 (68.2%)

Ā 
  1. 1Chi-square test.
  2. 2The optimal cut-off points for PD-L1 and GTVnx were determined by the receiver operating characteristic (ROC) curve for overall survival (OS).
  3. 3According to the 7th Edition of the AJCC/UICC Staging System for Nasopharyngeal Cancer.