Table 1.
Population characteristics of responders versus nonresponders according to former international guidelines13–15
| Total group | ERS |
ATS |
BTS |
||||
|---|---|---|---|---|---|---|---|
| Responders | Nonresponders | Respodners | Nonresponders | Responders | Nonresponders | ||
| Number | 286 | 25 | 261 | 44 | 242 | 35 | 251 |
| (% of total) | (9%) | (91%) | (16%) | (84%) | (12%) | (88%) | |
| Age (range) | 59.1 (34–76) | 59 | 59 | 59 | 59 | 59 | 59 |
| Gender (f/m) | 77/209 | 12/13* | 65/196 | 18/26* | 59/183 | 16/19* | 61/190 |
| (% female) | (27%) | (48%) | (25%) | (41%) | (24%) | (46%) | (24%) |
| Smoking (curr/form) | 125/161 | 9/16 | 116/145 | 14/30 | 111/131 | 11/24 | 114/137 |
| (% current) | (44%) | (36%) | (44%) | (32%) | (46%) | (31%) | (45%) |
| Pack years (SD) | 28.2 (17.5) | 29 | 28 | 29 | 28 | 31 | 28 |
| FEV1postBD (%pred) | 69.4 (15.6) | 69 | 69 | 68 | 70 | 65 | 70 |
| FVC postBD (%pred) | 89.9 (17.7) | 94 | 89 | 91 | 90 | 91 | 90 |
| FEV1/FVC (SD) | 62.6 (11.8) | 60 | 63 | 61 | 63 | 58 | 63 |
| BD-Reversibility (%) | 6.2 (5.1) | 6 | 6 | 6 | 6 | 6 | 6 |
| BMI (kg/m2) | 26.3 (4.4) | 26 | 26 | 25 | 27 | 25 | 27 |
Notes:
*
Statistical difference between responders and nonresponders, P < 0.05.
Abbreviations: ATS, American Thoracic society; BD, bronchodilators; BMI, body mass index; BTS, British Thoracic society; ERS, European Respiratory Society; FEV1, forced expiratory volume in one second; FVC, forced vital capacity; SD, standard deviation.