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Table 4 Four-field matrixes for comparison of lung function parameters with findings of pleural plaquea resp. of pulmonary fibrosisb

From: Relations between vital capacity, CO diffusion capacity and computed tomographic findings of former asbestos-exposed patients: a cross-sectional study

CT

VC

DLCO

DLCO/VA

≥ LLN

< LLN

≥ LLN

< LLN

≥ LLN

< LLN

Pleural plaques

none

14

0

11

3

11

3

yes

23

4

15

12

26

1

Accuracy

43.9%

56.1%

29.3%

Cohens Kappa

0.10

0.19

−0.13

Pulmonary fibrosis

none

21

2

19

4

22

1

yes

16

2

7

11

15

3

Accuracy

56.1%

73.2%

61.0%

Cohens Kappa

0.03

0.45

0.13

  1. apleural plaque means ≥1 P. in score A; bpulmonary fibrosis means ≥2 P. in score B; VC vital capacity, LLN lower limit of normal, DLCO diffusion capacity with CO, DLCO/VA diffusion capacity with CO in relation to alveolar volume