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Table 2 Characteristics of patients in the three groups and with the X2 test for categorical variables

From: Effect of thoracic radiotherapy dose on the prognosis of advanced lung adenocarcinoma harboring EGFR mutations

Characteristic

 < 50 Gy

 ≥ 50 Gy,

 < 60 Gy

 ≥ 60 Gy

P

Sex

 Male

40 (36.04%)

13

11

16

0.168

 Female

71 (63.96%)

12

24

35

 

Age, n (%)

 Median age, y (range)53

  ≥ 60

32 (28.83%)

10

8

14

0.337

  < 60

79 (71.17%)

15

27

37

 

Tobacco smoking, n (%)

 yes

21 (18.92%)

9

5

7

0.032

 no

90 (81.08%)

15

30

45

 

EGFR mutation, n (%)

 19

49 (44.14%)

5

19

25

0.065

 21

50 (45.05%)

15

14

21

 

Number of radiotherapy sites

 1、2、3

104(93.70%)

23

31

50

0.192

 4、5、6

7 (6.30%)

2

4

1

 

Radiation pneumonitis

 1、2

79 (71.18%)

17

24

38

0.514

 3

4 (3.60%)

0

2

2

 

Radiotherapy targeting synchronization

 yes

19 (17.12%)

4

9

6

0.237

 no

92 (82.88%)

21

26

45