Table 2. Comparison of Fibrotic Interstitial Lung Abnormalities on CT in UIP without Emphysema, UIP with Emphysema and SRIF Groups.
| UIP without Emphysema (N = 30) | UIP with Emphysema (N = 26) | SRIF (N = 9) | |
|---|---|---|---|
| Asymmetry | 10 (33.3) | 10 (38.5) | 6 (66.7) |
| Juxta-subpleural sparing on honeycombing area | 3 (10) | 6 (23.1) | 4 (44.4) |
| Emphysema beside the honeycombing area | 1 (3.3) | 11 (42.3) | 5 (55.6) |
| Absence of ground grass attenuation/reticulation in honeycombing area | 10 (33.3) | 5 (19.2) | 4 (44.4) |
| Inhomogeneous honeycombing | 3 (3.3) | 9 (34.6) | 6 (66.7) |
| Absence of honeycombing in the upper lobes | 15 (50) | 16 (61.5) | 7 (77.8) |
Parentheses represent percentage. UIP = usual interstitial pneumonia, SRIF = smoking-related interstitial fibrosis.