| IPF (n = 36) | Non-IPF (n = 38) | P |
---|---|---|---|
Pulmonary function tests | Â | Â | Â |
 %FVC, % | 71.5 ± 20.7 | 72.9 ± 19.5 | NS |
 %DLCO, % | 56.0 ± 23.9 | 52.5 ± 19.9 | NS |
Quantitative CT indices | Â | Â | Â |
 HAA% (>-200 HU), % | 1.90 ± 1.31 | 1.76 ± 0.99 | NS |
 LAA% (<-960 HU), % | 5.25 ± 5.17 | 2.64 ± 2.62 | <0.01 |
 CA%, % | 1.50 ± 2.41 | 0.41 ± 0.80 | <0.01 |
 MLD, HU | −767.4 ± 51.0 | −749.1 ± 54.6 | NS |
 SD-LD, HU | 197.6 ± 24.6 | 194.3 ± 20.7 | NS |
 Kurtosis | 2.54 ± 1.87 | 2.21 ± 1.82 | NS |
 Skewness | 1.67 ± 0.44 | 1.56 ± 0.45 | NS |
CT visual scores | Â | Â | Â |
 GGO score [0-5] | 0.21 ± 0.25 | 0.67 ± 0.61 | <0.01 |
 Fibrosis score [0-5] | 2.10 ± 0.44 | 1.23 ± 0.59 | <0.01 |
 Fibrosis score ≥2 in any field | 35 (97 %) | 13 (34 %) | <0.01 |