Skip to main content

Table 1 Baseline characteristics before and after propensity score matching

From: Prognostic significance of 4R lymph node dissection in patients with right primary non-small cell lung cancer

Variables

Entire cohort

Propensity score matching

S4RD− no. (%)

S4RD+ no. (%)

P

S4RD− no. (%)

S4RD+ no. (%)

P

No.

207

1863

 

205

799

 

Age (year)

  

0.860

  

0.945

 ≥ 65

63 (30.4)

551 (29.6)

 

63 (30.7)

250 (31.3)

 

 < 65

144 (69.6)

1312 (70.4)

 

142 (69.3)

549 (68.7)

 

Gender

  

0.368

  

0.808

 Male

109 (52.7)

1047 (56.2)

 

107 (52.2)

407 (50.9)

 

 Female

98 (47.3)

816 (43.8)

 

98 (47.8)

392 (49.1)

 

Smoking history

  

< 0.001

  

0.926

 Yes

92 (44.4)

1080 (58.0)

 

91 (44.4)

360 (45.1)

 

 No

115 (45.6)

783 (42)

 

114 (55.6)

439 (54.9)

 

Surgical approaches

  

0.791

  

0.585

 Thoracotomy

114 (55.1)

1003 (53.8)

 

112 (54.6)

417 (52.2)

 

 Thoracoscopic surgery

93 (44.9)

860 (46.2)

 

93 (45.4)

382 (47.8)

 

Tumor location

  

0.025

  

0.710

 Upper lobe

91 (44.0)

645 (34.6)

 

97 (47.3)

373 (46.7)

 

 Middle lobe

19 (9.2)

224 (12.0)

 

19 (9.3)

90 (11.3)

 

 Lower lobe

97 (46.9)

994 (53.4)

 

89 (43.4)

336 (42.1)

 

Histological type

  

0.065

  

0.601

 Adenocarcinoma

157 (75.8)

1265 (67.9)

 

155 (75.6)

630 (78.8)

 

 Squamous cell carcinoma

33 (15.9)

397 (21.3)

 

33 (16.1)

113 (14.1)

 

 Others

17 (8.2)

201 (10.8)

 

17 (8.3)

56 (7.0)

 

Adjuvant chemotherapy

  

0.218

  

0.415

 No

140 (67.6)

1174 (63.0)

 

140 (68.3)

519 (65.0)

 

 Yes

67 (32.4)

689 (37.0)

 

65 (31.7)

280 (35.0)

 

pT

  

0.436

  

0.943

 T1a

23 (11.1)

169 (9.1)

 

23 (11.2)

88 (11.0)

 

 T1b

59 (28.5)

557 (29.9)

 

59 (28.8)

240 (30.0)

 

 T1c

56 (27.1)

524 (28.1)

 

56 (27.3)

224 (28.0)

 

 T2a

27 (13.0)

252 (13.5)

 

27 (13.2)

110 (13.8)

 

 T2b

17 (8.2)

157 (8.4)

 

17 (8.3)

49 (6.1)

 

 T3

13 (6.3)

147 (7.9)

 

13 (6.3)

56 (7.0)

 

 T4

12 (5.8)

57 (3.1)

 

10 (4.9)

32 (4.0)

 

pN

  

0.058

  

0.565

 N0

162 (78.3)

1355 (72.7)

 

162 (79.0)

628 (78.6)

 

 N1

15 (7.2)

109 (5.9)

 

14 (6.8)

42 (5.3)

 

 N2

30 (14.5)

399 (21.4)

 

29 (14.1)

129 (16.1)

Â