Your privacy, your choice

We use essential cookies to make sure the site can function. We also use optional cookies for advertising, personalisation of content, usage analysis, and social media.

By accepting optional cookies, you consent to the processing of your personal data - including transfers to third parties. Some third parties are outside of the European Economic Area, with varying standards of data protection.

See our privacy policy for more information on the use of your personal data.

for further information and to change your choices.
Skip to main content

Table 2 EIT parameters and PFT parameters before and after the bronchodilation test

From: Regional lung function assessment using electrical impedance tomography in COPD, PRISm, and normal spirometry subjects: insights into early diagnostic potential

Variables

Normal (n = 84)

COPD(n = 56)

PRISm (n = 21)

P

Before

After

P

Before

After

P

Before

After

P

After

GI FEV1

GI FVC

CoV

GI FEV1/FVC

FEV1/FVC abnormal area

GI-MEF25-75

GI-T75

Average time required

GI-FIVC

Lung Size

τmed

τiqr

FVC% pred

FEV1%pred

FEV1/FVC

0.39 (0.36–0.41)

0.39 (0.36–0.42)

50.38 ± 4.09

0.11(0.08–0.18)

12.75 (5.58–22.23)

0.39 (0.37–0.41)

0.15 (0.10–0.21)

0.75 (0.65–0.80)

0.38 (0.36–0.41)

396.76 ± 56.36

0.48 (0.38–0.58)

0.16 (0.09–0.28)

98.56 ± 11.61

95.63 ± 10.72

79.73 ± 6.21

0.39 (0.36–0.41)

0.39 (0.36–0.43)

49.93 ± 3.71

0.10(0.07–0.17)

10.37 (3.34–19.04)

0.39 (0.36–0.41)

0.12 (0.09–0.17)

0.70 (0.60–0.80)

0.38 (0.35–0.42)

409.52 ± 53.03

0.42 (0.35–0.55)

0.12 (0.05–0.22)

98.35 ± 11.55

97.62 ± 10.39

81.70 ± 5.92

.840

.757

.068

.380

.031

.889

.007

.000

.690

.003

.000

.003

.634

.000

.000

0.42 (0.38–0.46)

0.39 (0.36–0.43)

47.75 ± 4.45

0.17 (0.13–0.23)

82.93 (66.81–95.48)

0.41 (0.38–0.46)

0.29 (0.22–0.37)

1.85 (1.30–2.58)

0.40 (0.35–0.43)

425.43 ± 55.48

1.33 (1.06–1.83)

0.55 (0.40–0.69)

79.16 ± 16.32

58.08 ± 17.62

56.98 ± 9.65

0.41 (0.38–0.45)

0.39 (0.37–0.42)

47.95 ± 4.40

0.17 (0.12–0.21)

83.40 (52.29–98.39)

0.40 (0.37–0.44)

0.28 (0.21–0.36)

1.70 (1.20–2.36)

0.39 (0.36–0.43)

436.39 ± 55.67

1.20 (0.87–1.67)

0.50 (0.37–0.60)

82.35 ± 16.92

61.56 ± 18.33

57.72 ± 9.82

.519

.499

.552

.522

.082

.468

.974

.012

.708

.110

.000

.150

.000

.000

.175

0.40 (0.37–0.46)

0.39 (0.36–0.46)

50.60 ± 3.39

0.14 (0.10–0.19)

24.19 (18.78–43.66)

0.40 (0.36–0.44)

0.18 (0.15–0.24)

0.90 (0.70–1.00)

0.39 (0.36–0.46)

396.19 ± 41.37

0.59 (0.41–0.70)

0.25 (0.13–0.32)

75.60 ± 7.44

69.50 ± 7.69

73.68 ± 6.03

0.43 (0.38–0.46)

0.42 (0.38–0.45)

51.03 ± 3.72

0.14 (0.12–0.29)

25.46 (17.31–41.31)

0.42 (0.38–0.46)

0.20 (0.15–0.24)

0.80 (0.60–0.90)

0.42 (0.39–0.46)

417.33 ± 56.16

0.53 (0.39–0.67)

0.25 (0.14–0.36)

79.04 ± 8.99

73.79 ± 5.42

76.15 ± 4.41

.619

.193

.408

.096

.633

.268

.615

.007

.248

.016

.109

.176

.062

.005

.007

.000

.025

.003

.000

.000

.012

.000

.000

.020

.022

.000

.000

.000

.000

.000

  1. The p—value following each group indicates whether there is a statistically significant difference before and after the bronchodilation test for that group. “P after” refers to whether there is a statistically significant difference among the three groups after the bronchodilation test. EIT electrical impedance tomography, PFT pulmonary fucnction tests, GI global inhomogeneity, FEV1 forced expiratory volume in 1 s, FVC forced vital capacity, MEF maximal expiratory flow, FIVC, forced inspiration vital capacity
Back to article page

BMC Pulmonary Medicine

ISSN: 1471-2466

Contact us