Inspiration | Expiration | |||||
All | ILD | COPD | All | ILD | COPD | |
MPAD | 0.479 | 0.456 | 0.574 | 0.444 | 0.415 | 0.534 |
RPAD | 0.335 | 0.295 | 0.462 | 0.327 | 0.327 | 0.327 |
LPAD | 0.339 | 0.323 | 0.405 | 0.273 | 0.254 | 0.183ns |
(RPAD+LPAD)/2 | 0.360 | 0.329 | 0.463 | 0.297 | 0.269 | 0.265 |
PA:Ao | 0.507 | 0.489 | 0.579 | 0.488 | 0.461 | 0.564 |
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.