Variables

RT group (n, %)

CT group (n, %)

χ2

p value

Preoperative CT

No

19

63.3%

38

52.1%

2.48

0.116

Yes

11

36.7%

35

47.9%

Age

<40 years

13

43.3%

21

28.8%

3.67

0.055

≥40 years

17

56.7%

52

71.2%

Stage

IB1

13

43.3%

26

35.6%

3.60

0.308

IB2

7

23.3%

26

35.6%

IIA

2

6.7%

9

12.3%

IIB

8

26.7%

12

16.4%

Number of risk factors

1

23

76.7%

62

84.9%

2.40

0.302

2

6

20.0%

9

12.3%

≥3

1

3.3%

2

2.7%

Differentiation

Well

3

10.0%

8

11.0%

2.81

0.246

Intermediate

14

46.7%

42

57.5%

Poor

13

43.3%

23

31.5%

Cell type

Squamous

29

96.7%

59

80.8%

13.44

0.02

Glandular

1

3.3%

11

15.1%

Others

0

0.0%

3

4.1%

Tumor size

≤4cm

18

60.0%

37

50.7%

0.16

0.563

>4cm

12

40.0%

36

49.3%

DSI

Inner half

13

43%

31

42%

0.02

0.886

Outer half

17

57%

42

58%

LVSI

No

23

76.7%

65

89.0%

5.10

0.024

Yes

7

23.3%

8

11.0%