Table 1 Comparison of baseline characteristics between the MPE group and the BPE group in both the training set and test set

Age

 < 60

112

39

0.069

84

24

0.149

 ≥ 60

162

35

138

25

Gender

 Male

144

46

0.141

130

34

0.160

 Female

130

28

92

15

Smoking history

 Yes

100

31

0.395

97

25

0.351

ECOG-PS

 0–1

261

67

0.122

214

44

0.500

 2–3

13

7

8

5

Cancer type^a

 Adenocarcinoma

261

–

210

–

 Squamous cell carcinoma

5

–

2

–

 Small cell lung cancer

8

–

10

–

No-lung cancer type^b

 Tuberculosis

–

28

–

24

 Bacterial infections

–

13

–

8

 Other diseases

–

33

–

17