Results of bronchial wall measurements by HRCT scanning
| Group 1 | Group 2 | Group 3 | Group 4 | |
|---|---|---|---|---|
| No. of bronchi evaluated per patient2-150 | 19.3 (6.4) | 20.4 (6.3) | 20.5 (6.5) | 18.6 (5.9) |
| Total number of bronchi per group | 288 | 266 | 246 | 261 |
| Mean (SD) T (mm)2-151 | 1.28 (0.37) | 1.21 (0.38) | 1.12 (0.24) | 1.09 (0.24) |
| Mean (SD) T/D ratio2-151 | 0.27 (0.05) | 0.27 (0.05) | 0.25 (0.04) | 0.23 (0.04) |
| Mean (SD) WA%2-151 | 78 (9.2) | 78.8 (9.2) | 74.2 (7.5) | 70.9 (8.2) |
T = thickness; D = outer diameter; WA% = percentage wall area.
↵2-150 There was no statistically significant difference between the groups.
↵2-151 There was no significant difference between groups 1 and 2, but both groups were significantly greater than either group 3 or 4 (p < 0.001) and group 3 was significantly greater than group 4 (p < 0.01).