Table 1 Characteristic parameters
| Parameter | SP sign | |||||
|---|---|---|---|---|---|---|
|
BPT (−) (N = 1782) |
BPT (+) (N = 341) | P value |
BDT (−) (N = 194) |
BDT (+) (N = 25) | P value | |
| Pre-BDT or BPT, % | ||||||
| Vol A/FVC ratio |
19.0 (16.1, 23.1) |
19.6 (15.9, 23.2) | .468 |
17.5 (13.9, 21.8) |
0.0 (0.0, 9.8) | < .0001 |
| Flow A/PEF ratio |
90.6 (86.2, 93.8) |
87.6 (83.6, 92.1) | < .0001 |
88.6 (82.5, 93.1) |
0.0 (0.0, 78.0) | < .0001 |
| Vol B/FVC ratio |
40.9 (32.5, 49.1) |
37.6 (31.4, 44.5) | < .0001 |
30.2 (22.9, 36.8) |
0.0 (0.0, 14.3) | < .0001 |
| Flow B/PEF ratio |
73.7 (64.9, 81.3) |
73.5 (67.8, 79.9) | .404 |
78.3 (69.6, 85.2) |
0.0 (0.0, 71.1) | < .0001 |
| (Vol A − Vol B)/FVC ratio |
19.9 (13.2, 28.4) |
16.6 (11.0, 22.7) | < .0001 |
10.0 (6.3, 16.6) |
0.0 (0.0, 3.3) | < .0001 |
| (Flow A − Flow B)/PEF ratio |
15.9 (10.1, 22.3) |
12.4 (8.3, 18.1) | < .0001 |
8.7 (5.5, 13.8) |
0.0 (0.0, 3.7) | < .0001 |
| Post-BDT or BPT, % | ||||||
| Vol A/FVC ratio |
18.6 (15.2, 23.0) |
0.0 (0.0, 10.2) | < .0001 |
17.5 (14.9, 22.1) |
16.6 (14.9, 19.1) | .083 |
| Flow A/PEF ratio |
90.3 (85.2, 94.1) |
0.0 (0.0, 68.7) | < .0001 |
89.2 (83.8, 93.4) |
88.0 (83.9, 93.3) | .498 |
| Vol B/FVC ratio |
35.0 (26.6, 43.9) |
0.0 (0.0, 15.6) | < .0001 |
33.8 (25.4, 40.3) |
32.9 (25.2, 37.9) | .331 |
| Flow B/PEF ratio |
76.5 (66.4, 84.2) |
0.0 (0.0, 56.9) | < .0001 |
76.2 (68.2, 83.0) |
73.5 (69.2, 80.0) | .258 |
| (Vol A − Vol B)/FVC ratio |
14.1 (8.8, 22.4) |
0.0 (0.0, 3.6) | < .0001 |
12.8 (8.5, 20.6) |
15.8 (10.3, 20.2) | .226 |
| (Flow A − Flow B)/PEF ratio |
11.7 (6.8, 18.2) |
0.0 (0.0, 2.5) | < .0001 |
11.5 (7.0, 16.8) |
13.2 (8.7, 19.0) | .181 |