Before drainage | After drainage | Mean (95% CI) difference | p value for difference | % change | |
FEV1 (l) | 0.87 (0.10) | 1.04 (0.12) | 0.17 (0.06 to 0.28) | 0.006 | 20 |
FVC (l) | 1.09 (0.13) | 1.30 (0.16) | 0.21 (0.08 to 0.34) | 0.004 | 19 |
Breathlessness score over the past 24 hours | |||||
At worst | 7.4 (0.6) | 4.0 (0.5) | 3.4 (1.7 to 5.1) | 0.005 | 46 |
On average | 4.5 (0.5) | 2.4 (0.4) | 2.1 (0.8 to 3.4) | 0.008 | 47 |
Amount of trouble or bother | 6.6 (0.5) | 2.3 (0.7) | 4.3 (2.3 to 6.3) | 0.002 | 65 |
No. of numbers read | 66.9 (2.5) | 82.5 (4.8) | 15.6 (9.8 to 21.4) | 0.0001 | 23 |
No. of numbers read per breath | 4.8 (0.8) | 7.7 (1.2) | 2.9 (1.1 to 4.7) | 0.003 | 60 |
FEV1 = forced expiratory volume in one second; FVC = forced vital capacity.