Functional respiratory imaging in relation to classical outcome measures in cystic fibrosis: a cross-sectional study

Table 2 Correlations FRI versus CF-CT (n = 39)

FRI	CF-CT scores (%)
FRI	BE	Mucus	BWT	Parenchyma	AT	Total
iVlobe at TLC (L)	NS	NS	NS	− 0.17*	NS	NS
Sqrt of iVlobe at FRC (L)	NS	NS	0.18*	NS	NS	NS
Log of siVaw at TLC (mL/L)	0.40***	NS	0.17*	0.26***	0.23**	0.35***
Log of siVaww at TLC (mL/L)	0.30***	0.16*	0.18*	0.36***	NS	0.30***
Cube root of siRaw at TLC (kPa * s/L)	NS	NS	NS	− 0.21**	− 0.23**	− 0.15*
AT at FRC (%)	0.37***	0.35***	0.29***	0.21**	0.38***	0.43***
Sqrt of TBV at TLC (mL/L)	NS	0.41***	0.16*	0.32***	NS	0.20*
Sqrt of BV10% at TLC (%)	NS	0.19*	NS	0.37***	NS	0.16*
BV5_10% at TLC (%)	0.55***	0.43***	0.50***	NS	0.41***	0.57***
Square of BV5% at TLC (%)	− 0.22**	− 0.32***	− 0.26***	− 0.40***	− 0.22**	− 0.34***

Repeated measures correlation coefficients, *p < 0.05; **p < 0.01; ***p < 0.001
iVlobe lobar volume, siVaw specific airway volume, siVaww specific airway wall volume, siRaw specific airway resistance, AT air trapping, TBV total pulmonary blood volume corrected for lobar volume, BV10% percentage of blood vessels larger than 10 mm², BV5_10% percentage of blood vessels between 5 and 10 mm², BV5% percentage of blood vessels smaller than 5 mm², BE bronchiectasis, BWT bronchial wall thickening

ISSN: 1471-2466