Table 1 Patient Characteristics Before and After Propensity Score Matching

Sex(Female)

139(38.3%)

45(44.6%)

0.128

36(41.4%)

38(43.7%)

0.047

BMI

16.8 ± 2.2

16.2 ± 2.1

0.312

16.7 ± 2.6

16.5 ± 2.5

0.078

Age, m, median (IQR)

8(6,12)

26(10,53)

0.913

14(8,30)

17(8,29)

0.070

preterm delivery

12(3.3%)

3(2.9%)

0.023

3(3.4%)

2(2.3%)

0.066

Year of operation

2015

9(2.5%)

15(14.9%)

0.451

8(9.2%)

10(11.5%)

0.076

2016

38(10.5%)

21(20.8%)

0.286

20(23%)

18(20.7%)

0.056

2017

89(24.5%)

22(21.8%)

0.064

23(26.4%)

20(23%)

0.079

2018

148(40.8%)

26(25.7%)

0.325

23(26.4%)

24(27.6%)

0.027

2019

79(21.8%)

17(16.8%)

0.127

13(14.9%)

15(17.2%)

0.063

Operation history

1(0.3%)

8(7.9%)

0.391

1(1.1%)

2(2.3%)

0.093

ASA status

1

26(7.2%)

2(2.0%)

0.250

3(3.4%)

2(2.3%)

0.066

2

337(92.8%)

99(98.0%)

0.250

84(96.6%)

85(97.7%)

0.066

Disease categories

congenital pulmonary airway malformations

271(74.7%)

89(88.1%)

0.350

74( 85.1%)

75(86.2%)

0.031

introlobar sequestration

92(25.3%)

11(10.9%)

0.381

13(14.9%)

11(12.6%)

0.067

congenital lobar emphysema

0

1(1%)

0.142

0(0%)

1(1.1%)

0.149

Location

Left

200(55.1%)

37(36.6%)

0.378

39(44.8%)

35(40.2%)

0.093

Right

163(44.9%)

64(63.4%)

0.378

48(55.2%)

52(59.8%)

0.093

Lesion involved

Single lobe

341(93.9%)

90(89.1%)

0.173

80(92.0%)

78(89.7%)

0.080

Double lobes

21(5.8%)

10(9.9%)

0.153

7(8.0%)

9(10.3%)

0.080

Triple lobes

1(0.3%)

1(1.0%)

0.087

0

0

Maximal size, cm, median (IQR)

4(2.2, 5)

5.3(3.6, 6.4)

0.667

4.6(3.4, 5.3)

5(3.6, 6.1)

0.065

Type of resection

lobectomy

216(59.5%)

88(87.1%)

0.657

74(85.1%)

76(87.4%)

0.067

Segmentectomy

137(37.7%)

11(10.9%)

0.658

10(11.5%)

9(10.3%)

0.039

Lobectomy and Segmentectomy

10(2.8%)

2(2.0%)

0.026

3(3.4%)

2(2.3%)

0.066

Incomplete fissure

94(25.9%)

35(34.7%)

0.192

27(31.0%)

30(34.5%)

0.075

comorbidities

21(5.8%)

12(11.9%)

0.216

8(9.2%)

10(11.5%)

0.076