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Table 3 Comparison of STAS in patients with stage I NSCLC after PSM

From: Impact of preoperative biopsy on tumor spread through air spaces in stage I non-small cell lung cancer: a propensity score-matched study

Variable

PNB (n = 38)

Non-biopsy (n = 38)

P-value

BB (n = 28)

Non-biopsy (n = 28)

P-value

STAS

 No

22(57.9)

25(65.8)

0.479

16(57.1)

15(53.6)

0.788

 Yes

16(42.1)

13(34.2)

 

12(42.9)

13(46.4)

 

STAS degree

 None

22(57.9)

25(65.8)

0.476*

16(57.1)

15(53.6)

0.788#

 Limited

0

1(2.6)

 

0(0.0)

0(0.0)

 

 Extensive

16(42.1)

12(31.6)

 

12(42.9)

13(46.4)

 
  1. NSCLC non-small cell lung cancer, PSM propensity score matching, PNB percutaneous needle biopsy, BB bronchoscopic biopsy, STAS tumor spread through air spaces
  2. #Because the Limited in both groups were 0, the 2 × 2 chi-square test was performed after deleting this item
  3. *Using Fisher’s exact test