From: The CT pulmonary vascular parameters and disease severity in COPD patients on acute exacerbation: a correlation analysis
Groups
Cases
CSA (%)
PA/A
Mild group
41
0.68 ± 0.12
0.83 ± 0.29
Moderate group
45
0.62 ± 0.15
0.88 ± 0.25
Severe group
42
0.55 ± 0.13
0.94 ± 0.30
p
0.013
0.009