Table 2. Characteristics of the 988 patients included in the analysis.
| Characteristic | n | % (N = 988) |
|---|---|---|
| Age group | ||
| ≤55 | 212 | 21.5 |
| 55 to 64 | 359 | 36.3 |
| 65 to 74 | 301 | 30.5 |
| ≥ 75 | 116 | 11.7 |
| Sex | ||
| Male | 481 | 48.7 |
| Female | 507 | 51.3 |
| MRC breathlessness scale (N = 950) | ||
| ≥3 | 449 | 47.3 |
| < 3 | 501 | 52.7 |
| BMI | ||
| < 19 | 39 | 4.0 |
| 19–25 | 353 | 35.7 |
| ≥25 | 596 | 60.3 |
| Record of cardiovascular disease | ||
| No | 731 | 74.0 |
| Yes | 257 | 26.0 |
| Record of asthma | ||
| No | 482 | 48.8 |
| Yes | 506 | 51.2 |
| Record of GORD | ||
| No | 729 | 73.8 |
| Yes | 259 | 26.2 |
| GOLD 2006 grade (N = 592) | ||
| 1 | 76 | 12.8 |
| 2 | 285 | 48.1 |
| 3 | 185 | 31.3 |
| 4 | 46 | 7.8 |
| Smoking status | ||
| Ex-smoker | 447 | 45.2 |
| Current smoker | 541 | 54.8 |
| Index of multiple deprivation quintile (N = 985) | ||
| 1 (least deprived) | 152 | 15.4 |
| 2 | 213 | 21.6 |
| 3 | 188 | 19.1 |
| 4 | 216 | 21.9 |
| 5 (most deprived) | 216 | 21.9 |