Table 2.

HRCT indexes observed in our population study

HRCT indexes	Mean ± SDa or n (%)			Median (interquartile range)
Kurtosis baseline	3.018 ± 2.837			2.05 (1.17; 4.39)
Kurtosis baseline PFb	2.2 ± 1.9			1.8 (0.785; 3.445)
Kurtosis baseline NPFc	3.67 ± 3.3			2.12 (1.395; 5.155)
Kurtosis follow-up	2.938 ± 2.986			2.33 (1.13; 4.1)
Kurtosis follow-up PFb	1.775 ± 1.695			1.885 (0.172; 3.177)
Kurtosis follow-up NPFc	3.887 ± 3.473			3.09 (1.34; 4.935)
Skewness baseline	1.529 ± 0.599			1.48 (1.14; 1.98)
Skewness baseline PFb	1.366 ± 0.505			1.37 (0.955; 1.67)
Skewness baseline NPFc	1.662 ± 0.646			1.5 (1.21; 2.16)
Skewness follow-up	1.493 ± 0.659			1.4 (1.15; 1.97)
Skewness follow-up PFb	1.239 ± 0.568			1.395 (0.79; 1.675)
Skewness follow-up NPFc	1.699 ± 0.655			1.4 (1.245; 2.14)
HAAd%−600 baseline	21.06 ± 11.951			17.4 (12.89; 26.6)
HAAd%−600 baseline PFb	24.125 ± 13.119			20.755 (14.94; 28.05)
HAAd%−600 baseline NPFc	18.565 ± 10.5			16.33 (10.765; 23.53)
HAAd%−600 follow-up	21.917 ± 14.197			18.65 (12; 28.06)
HAAd%−600 follow-up PFb	27.563 ± 17.763			20.65 (15; 36.645)
HAAd%−600 follow-up NPFc	17.317 ± 8.264			17.02 (9.55; 22.845)
HAAd%−700 baseline	35.65 ± 18.144			32.51 (21.79; 42.05)
HAAd%−700 baseline PFb	40.446 ± 18.626			37.5 (27.04; 45.69)
HAAd%−700 baseline NPFc	31.746 ± 17.096			27.69 (19.167; 40.43)
HAAd%−700 follow-up	36.054 ± 18.854			33.89 (20.77; 45.28)
HAAd%−700 follow-up PFb	43.52 ± 21.287			38.045 (26.422; 56.805)
HAAd%−700 follow-up NPFc	29.971 ± 14.3			28.9 (16.77; 41.28)

Baseline and follow-up Pearson analysis for all patients, between HRCT indexes (Kurtosis, Skewness, HAA% −600, HAA% −700) and PFT values. Levels of significance for each correlation are reported in brackets.

^aSD, standard deviation.

^bPF, progressive fibrosing.

^cNPF, non-progressive fibrosing.

^dHAA, high attenuation area.