Table 4 Disease characteristics of patients with polymetastases with chemotherapy + thoracic radiotherapy vs. chemotherapy after Propensity Score Matching.

From: Thoracic radiotherapy (TRT) improved survival in both oligo- and polymetastatic extensive stage small cell lung cancer

Characteristic

Before Matching

After Matching

ChT + TRT (n = 93)

ChT (n = 99)

P

ChT + TRT (n = 73)

ChT (n = 73)

P

Age (years) ≥65

23

34

0.145

18

24

0.273

Sex,male

72

75

0.786

59

55

0.424

Smoking index, ≥400

69

84

0.067

57

60

0.534

Family history of neoplasm

19

24

0.527

16

16

1.000

Weight loss, >5%,

11

6

0.160

10

5

0.173

KPS score, ≥80

88

91

0.456

69

71

0.404

No. of ChT cycles

  

0.548

  

0.596

  1–3

13

11

 

9

7

 

  ≥4

80

88

 

64

66

 

Response to ChT

  

0.023

  

0.505

  Yes

62

50

 

34

25

 

  No

31

49

 

39

48

 

PCI

  

0.033

  

0.085

  Yes

10

3

 

7

2

 

  No

83

96

 

66

71

 
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