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Table 2 Quantitative CT measurements

From: Airway wall thickness is increased in COPD patients with bronchodilator responsiveness

 

BDR-(10%)

BDR + (10%)

 

BDR-(15%)

BDR + (15%)

 

BDR-(ATS)

BDR + (ATS)

 
 

n = 2355

n = 1306

p

n = 2863

n = 798

p

n = 2385

n = 1276

p

%emphysema

11.36 ± 12.34

12.22 ± 11.96

.042

11.43 ± 12.23

12.53 ± 12.12

.024

11.78 ± 12.77

11.45 ± 11.96

.431

%gas trapping

33.96 ± 20.93

39.04 ± 20.22

<.0001

34.46 ± 20.85

40.48 ± 20.00

<.0001

34.93 ± 20.88

37.36 ± 20.61

.001

TLC

6.01 ± 1.43

6.09 ± 1.47

.090

6.01 ± 1.44

6.11 ± 1.48

.095

5.96 ± 1.44

6.31 ± 1.44

.134

FRC

3.78 ± 1.2

4.05 ± 1.24

<.0001

3.80 ± 1.20

4.15 ± 1.25

<.0001

3.87 ± 1.25

3.89 ± 1.10

<.0001

TLC %pred, race-adjusted

101.15 ± 16.52

103.65 ± 16.42

<.0001

101.34 ± 16.49

104.56 ± 16.44

<.0001

101.56 ± 16.41

102.94 ± 16.70

.016

FRC %pred, race-adjusted

117.90 ± 31.85

127.02 ± 31.12

<.0001

118.62 ± 31.69

130.25 ± 30.95

<.0001

118.86 ± 31.55

125.43 ± 32.10

<.0001

Pi10

3.69 ± 0.14

3.73 ± 0.15

<.0001

3.69 ± 0.14

3.74 ± 0.15

<.0001

3.69 ± 0.14

3.72 ± 0.15

<.0001

Pi15

5.17 ± 0.2

5.24 ± 0.21

<.0001

5.18 ± 0.20

5.26 ± 0.21

<.0001

5.17 ± 0.20

5.24 ± 0.21

<.0001

Wall area %, segmental

61.97 ± 3.15

63.12 ± 2.94

<.0001

62.08 ± 3.12

63.45 ± 2.89

<.0001

62.07 ± 3.14

62.97 ± 3.00

<.0001

  1. Definition of Abbreviations: TLC total lung capacity, FRC functional residual capacity.