TABLE 4

Spearman correlation coefficients showing the relationship between various high-resolution computed tomography-derived measures for pulmonary hypertension defined as mean pulmonary artery (PA) pressure ≥25 mmHg on right heart catheterisation

InspirationExpiration
AllILDCOPDAllILDCOPD
MPAD0.4790.4560.5740.4440.4150.534
RPAD0.3350.2950.4620.3270.3270.327
LPAD0.3390.3230.4050.2730.2540.183ns
(RPAD+LPAD)/20.3600.3290.4630.2970.2690.265
PA:Ao0.5070.4890.5790.4880.4610.564
PA angle−0.241−0.212−0.246−0.241−0.327−0.316

ILD: interstitial lung disease; COPD: chronic obstructive pulmonary disease; MPAD: main PA diameter; RPAD: right PA diameter; LPAD: left PA diameter; PA:Ao: PA to ascending aorta ratio. All values statistically significant unless indicated; ns: nonsignificant.