Quantitative assessment the longitudinal changes of pulmonary vascular counts in chronic obstructive pulmonary disease

Table 4 Correlation between vessel parameters and clinical/quantitative CT parameters

	Post FEV₁(%)	Post FEV₁/FVC	Post FVC	CAT	LAA-950	LAA-856exp
N_total/LSA	0.21¹	0.33¹	0.07	− 0.04	− 0.74¹	− 0.53¹
N_<5 mm/LSA	0.21¹	0.34¹	0.08	− 0.08	− 0.73¹	− 0.50¹

N_total Total number of vessels, N_<5 mm Total number of vessels with vessel area less than 5 mm², LSA Lung surface area at 6 mm from the pleural surface, FEV₁ Forced expiratory volume in 1 s, FVC Forced vital capacity, CAT COPD Assessment Test, LAA-950 Low-attenuation areas less than-950 Hounsfield unit on inspiration, LAA-856 Low-attenuation areas less than-856 Hounsfield unit on expiration
¹p < 0.001

ISSN: 1465-993X