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Table 3 Clinical features for the patient groups “necessity of chest tube insertion” and “no necessity of chest tube insertion”

From: Impact of radiomics features, pulmonary emphysema score and muscle mass on the rate of pneumothorax and chest tube insertion in CT-guided lung biopsies

Clinical and puncture feature

No necessity of chest tube (n = 125)

Necessity of chest tube (n = 55)

p-value

Gender (female)

44

15

0.28

Age (yrs)

66.94 ± 11.64

69.00 ± 9.10

0.43

Diabetes mellitus

28

14

0.68

Arterial hypertension

58

29

0.46

Prior known malignant disease

67

27

0.61

History of smoking (available in n = 179)

106 (85.5%)

45 (81.8%)

0.54

Pack years (available in n = 93)

22.60 ± 19.47

23.86 ± 22.59

0.99

COPD

22

20

0.01

GOLD stadium

0.90 ± 1.20

0.86 ± 1.09

0.98

Lung function testing(available in n = 123)

FVC_L

2.62 ± 0.98

2.96 ± 0.79

0.02

FVC in %

78.47 ± 20.24

87.32 ± 20.28

0.02

FEV1_L

1.96 ± 0.73

2.17 ± 0.74

0.16

FEV1 in %

74.48 ± 22.49

81.57 ± 26.87

0.16

FEV1/FVC

75.65 ± 13.23

73.22 ± 13.35

0.45

Rtot in %

138.78 ± 97.21

105.75 ± 70.01

0.09

TLC in %

102.95 ± 19.08

105.86 ± 17.79

0.49

RV in %

138.41 ± 45.18

139.75 ± 38.85

0.61

RV/TLC in %

53.56 ± 12.31

49.41 ± 8.76

0.09

DLCO_SB in %

55.64 ± 21.81

58.95 ± 20.93

0.48

DLCO_VA in %

70.37 ± 23.13

70.33 ± 23.12

0.78

Blood gas analysis(available in n = 111)

pO2 in mmHg

71.50 ± 11.70

74.01 ± 13.69

0.70

SaO2in %

94.18 ± 3.31

94.59 ± 2.60

0.73

pCO2in mmHg

35.90 ± 4.60

35.70 ± 4.08

0.84

AaDO2in mmHg

29.75 ± 10.68

30.83 ± 12.01

0.54

pH

7.44 ± 0.03

7.45 ± 0.03

0.55

Imaging features

Total emphysema score %LAA-950

13.77 ± 10.82

12.90 ± 11.79

0.66

Low attenuation volume of biopsied lobe (<-950 HU)

191.60 ± 125.99

187.41 ± 136.32

0.83

Total volume of biopsied lobe

923.26 ± 406.04

967.50 ± 438.55

0.55

Low attenuation volume ratio in %

19.95 ± 8.39

18.14 ± 9.12

0.30

_MinNorm

55.17 ± 51.88

74.50 ± 55.16

0.03

Variance*

1783.12 (1399.96)

1559.98 (1556.57)

0.04

Perc,01%

65.92 ± 34.59

79.63 ± 38.98

0.01

S(1,0)Contrast*

30.07 (17.76)

35.29 (24.68)

0.04

S(1,0)Correlat

0.82 ± 0.08

0.76 ± 0.15

0.03

S(1,0)InvDfMom

0.27 ± 0.07

0.24 ± 0.07

0.05

S(1,0)DifEntrp*

1.04 (0.13)

1.07 (0.15)

0.04

S(1,-1)Contrast*

57.09 (33.63)

67.65 (35.77)

0.03

S(1,-1)Correlat

0.64 ± 0.15

0.56 ± 0.21

0.02

S(1,-1)DifEntrp*

1.17 (0.14)

1.21 (0.14)

0.02

S(4,4)Correlat

0.14 ± 0.17

0.09 ± 0.16

0.03

Horzl_ShrtREmp

0.92 ± 0.03

0.93 ± 0.03

0.05

45dgr_LngREmph*

1.23 (0.20)

1.19 (0.17)

0.04

45dgr_ShrtREmp

0.94 ± 0.03

0.95 ± 0.02

0.04

45dgr_Fraction

0.92 ± 0.04

0.93 ± 0.03

0.05

Teta1

0.81 ± 0.08

1.4 ± 0.11

0.04

WavEnHL_s-1*

107.17 (61.38)

116.29 (96.88)

0.03

WavEnHH_s-2*

54.11 (41.62)

70.46 (45.08)

0.02

Biopsy settings

Needle length

3.83 ± 2.32

4.32 ± 2.34

0.14

Needle angle

60.35 ± 18.34

59.26 ± 18.93

0.94

Lung side (left lung)

53

28

0.27

Patient positioning

 Raised on the left

7

3

0.96

 Left lateral

9

5

0.67

 Raised on the right

9

2

0.35

 Right lateral

14

3

0.28

 Supine position

55

29

0.30

 Prone position

31

13

0.85

Lesion attached to pleura

56

19

0.22

Distance to pleura (mm)

0.74 ± 0.98

1.03 ± 1.18

0.12

Lesion solidity (solid)

115

53

0.35

Lesion size

4.94 ± 8.12

3.80 ± 3.60

0.47

Amount of biopsies

2.62 ± 1.19

2.76 ± 1.39

0.70

Duration (h:mm:ss)

00:17:26,72 ± 0:08:2.34

00:20:04,02 ± 00:11:32,49

0.34

Hemorrhage

72

35

0.48

Water lock

14

8

0.54

Diagnostic biopsy

103

46

0.82

  1. Values marked with * are reported in mean (interquartile range) because of their skewed distribution.
  2. Abbreviations:
  3. FVC = Forced vital capacity
  4. FEV1 = Forced Expiratory Volume in 1 second
  5. Rtot in % = total airway resistance
  6. TLC = Total lung capacity
  7. RV = Residual lung volume
  8. DLCO_SB = Diffusion capacity of the lungs for carbon monoxide (single breath)
  9. DLCO_VA = Diffusion capacity of the Lungs divided by alveolar volume
  10. pO2 = Partial pressure of oxygen
  11. SaO2 = Oxygen saturation
  12. pCO2 = Partial pressure of carbon dioxide
  13. AaDO2 = Alveolar-arterial gradient of oxygen
  14. pH = Potential of hydrogen
  15. HU = Hounsfield units