Table 4 Correlations FRI versus 6MWT (n = 21)

FRI

 iVlobe at TLC (L)

NS

NS

NS

 iVlobe at FRC (L)

NS

NS

− 0.69***

 Log of siVaw at TLC (mL/L)

NS

NS

NS

 Log of siVaww at TLC (mL/L)

NS

NS

NS

 Log of siRaw at TLC (kPa*s/L)

NS

NS

NS

 AT at FRC (%)

− 0.85***

NS

− 0.72***

 TBV at TLC (mL/L)

NS

NS

NS

 BV10% at TLC (%)

NS

NS

− 0.59**

 BV5_10% at TLC (%)

NS

NS

− 0.60**

 Square of BV5% at TLC (%)

NS

NS

0.53*

CF-CT

 Total score

− 0.53*

NS

− 0.73***

 Bronchiectasis

NS

NS

− 0.72***

 Mucus plugging

NS

NS

− 0.66**

 BWT

NS

NS

NS

 Parenchyma

− 0.45*

NS

NS

 AT

NS

NS

− 0.71***