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Table 6 Upper/lower zone Emph% and fSAD%

From: Imaging-based clusters in current smokers of the COPD cohort associate with clinical characteristics: the SubPopulations and Intermediate Outcome Measures in COPD Study (SPIROMICS)

Variable

Cluster 1

(N = 96)

Cluster 2

(N = 45)

Cluster 3

(N = 88)

Cluster 4

(N = 55)

P value

fSAD

(U/L ratio)

9.54

(14.04)

5.1

(6.06)

5.92

(6.64)

1.63

(1.42)

< 0.0001

Emph

(U/L ratio)

2.14

(3.15)

2.21

(2.36)

2.52

(3.42)

1.6

(1.85)

0.389

fSAD/Emph

(% Total)

1.75

(1.67)

5.91

(7.44)

5.15

(4.16)

4.60

(4.72)

< 0.0001

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Respiratory Research

ISSN: 1465-993X

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