Age (years) | 67.4 (65.1 to 69.7) | 69.6 (67.1 to 72.1) | 0.22 |
M/F | 22/19 | 13/26 | 0.07 |
BMI (kg/m2) | 22.9 (21.0 to 24.8) | 24.1 (22.0 to 26.2) | 0.41 |
Smoking (pack years) | 57.1 (47.5 to 66.7) | 46.2 (35.2 to 55.2) | 0.11 |
Duration of symptoms (days) | 10.7 (8.4 to 12.0) | 9.2 (6.8 to 11.6) | 0.38 |
Years of COPD | 12.0 (8.1 to 15.9) | 9.3 (6.9 to 11.7) | 0.24 |
VAS score | 74.7 (68.4 to 81.0) | 66.4 (59.7 to 73.1) | 0.08 |
Borg score | 5.0 (4.4 to 5.6) | 5.1 (4.4 to 5.8) | 0.77 |
FEV1 (l) | 0.64 (0.54 to 0.74) | 0.65 (0.57 to 0.73) | 0.84 |
FVC (l) | 1.76 (1.58 to 1.94) | 1.65 (1.47 to 1.83) | 0.40 |
Eosinophil count (%) | 1.9 (1.3 to 2.5) | 1.4 (0.7 to 2.1) | 0.30 |
No (%) on oral theophylline | 12 (29%) | 8 (21%) | 0.25 |
Theophylline level (µmol/l) | 61 (47 to 75) | 88 (72 to 104) | 0.58 |
pH | 7.41 (7.40 to 7.42) | 7.42 (7.40 to 7.44) | 0.26 |
Pao2 | 7.46 (6.98 to 7.94) | 7.67 (7.21 to 8.13) | 0.51 |
Paco2 | 5.96 (5.57 to 6.35) | 5.46 (5.04 to 5.87) | 0.07 |