From: Quantitative assessment the longitudinal changes of pulmonary vascular counts in chronic obstructive pulmonary disease
GOLD1 (n = 147)
GOLD2 (n = 118)
GOLD3,4 (n = 23)
p-value
Ntotal/LSA
1.16 ± 0.27
1.12 ± 0.29
0.87 ± 0.27
 < 0.001
N<5Â mm/LSA
1.02 ± 0.22
0.99 ± 0.23
0.78 ± 0.22