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Table 1 Baseline characteristics of all included patients and after exclusion of patients with surgically confirmed metastasis to inaccessible lymph nodes

From: Are there differences among operators in false-negative rates of endosonography with needle aspiration for mediastinal nodal staging of non-small cell lung cancer?

 

All patients

Excluding patients with inaccessible LNs

 

Total

True negative

False negative

P

Total

True negative

False negative

P

(n = 705)

(n = 594)

(n = 111)

(n = 681)

(n = 594)

(n = 87)

Age, year

65.6 ± 8.7

66.2 ± 8.5

62.4 ± 9.0

< 0.001

65.8 ± 8.6

66.2 ± 8.5

62.7 ± 8.7

0.001

Sex, female

171 (24.3)

135 (22.7)

36 (32.4)

0.029

163 (23.9)

135 (22.7)

28 (32.2)

0.054

Location of primary tumor

   

0.479

   

0.331

 Right

421 (59.7)

360 (60.6)

61 (55.0)

 

419 (61.5)

360 (60.6)

59 (67.8)

 

 Left

278 (39.4)

229 (38.6)

49 (44.1)

 

256 (37.6)

229 (38.6)

27 (31.0)

 Both

6 (0.9)

5 (0.8)

1 (0.9)

 

6 (0.9)

5 (0.8)

1 (1.1)

Histologic type

   

0.255

   

0.230

 Adenocarcinoma

338 (47.9)

277 (46.6)

61 (55.0)

 

326 (47.9)

277 (46.6)

49 (56.3)

 

 Squamous cell carcinoma

315 (44.7)

273 (46.0)

42 (37.8)

 

305 (44.8)

273 (46.0)

32 (36.8)

 Others

52 (7.4)

44 (7.4)

8 (7.2)

 

50 (7.3)

44 (7.4)

6 (6.9)

Duration of procedure, min

19.0 ± 7.7

19.1 ± 7.8

18.1 ± 7.0

0.229

19.0 ± 7.8

19.1 ± 7.8

18.5 ± 7.4

0.353

Combination of EUS

69 (9.8)

55 (9.3)

14 (12.6)

0.275

66 (9.7)

55 (9.3)

11 (12.6)

0.319

Numbers of evaluated lesions

 Total

3.0 ± 1.0

3.0 ± 1.0

2.8 ± 1.0

0.191

3.0 ± 1.0

3.0 ± 1.0

2.9 ± 1.0

0.510

 Mediastinal LNs

2.5 ± 0.9

2.5 ± 0.9

2.4 ± 0.9

0.311

2.5 ± 0.9

2.5 ± 0.9

2.4 ± 0.9

0.677

 Hilar LNs

0.5 ± 0.7

0.5 ± 0.7

0.4 ± 0.6

0.590

0.4 ± 0.7

0.5 ± 0.7

0.4 ± 0.6

0.733

 Lung parenchymal lesions

29 (4.1)

25 (4.2)

4 (3.6)

1.000

28 (4.1)

25 (4.2)

3 (3.4)

1.000

Time interval between EBUS/EUS-NA and surgery, day

19.5 ± 14.6

19.4 ± 14.7

19.6 ± 14.1

0.877

19.2 ± 14.3

19.4 ± 14.7

17.7 ± 10.9

0.307

Operator

   

0.388

   

0.533

A

290 (41.1)

240/290 (82.8)

50/290 (17.2)

 

282 (41.4)

240/282 (85.1)

42/282 (14.9)

 

B

219 (31.1)

187/219 (85.4)

32/219 (14.6)

 

209 (30.7)

187/209 (89.5)

22/209 (10.5)

C

84 (11.9)

66/84 (78.6)

18/84 (21.4)

 

79 (11.6)

66/79 (83.5)

13/79 (16.5)

D

67 (9.5)

60/67 (89.6)

7/67 (10.4)

 

66 (9.7)

60/66 (90.9)

6/66 (9.1)

E

33 (4.7)

30/33 (90.9)

3/33 (9.1)

 

33 (4.8)

30/33 (90.9)

3/33 (9.1)

F

12 (1.7)

11/12 (91.7)

1/12 (8.3)

 

12 (1.8)

11/12 (91.7)

1/12 (8.3)

  1. Data are presented as number (%) or mean ± standard deviation
  2. LN lymph node, EUS esophageal ultrasonography, EBUS/EUS-NA endobronchial ultrasonography and esophageal ultrasonography with needle aspiration