Table 1.
Characteristics of the 73 COPD patients in the study and 126 COPD patients in the London COPD Cohort not recruited to the study
| Recruited COPD patients (n = 73) | Not recruited COPD patients (n = 126) | P-value | |
|---|---|---|---|
| Mean (±SD) | Mean (±SD) | ||
| Age (years) | 71.1 (±8.7) | 70.2 (±8.8) | 0.51 |
| FEV1 (l) | 1.31 (±0.5) | 1.40 (±0.5) | 0.25 |
| FEV1 (% predicted) | 52.9 (±16.5) | 56.2 (±16.1) | 0.22 |
| FVC (l) | 2.79 (±0.9) | 2.76 (±0.9) | 0.83 |
| FEV1/FVC (%) | 47.8 (±12.6) | 50.7 (±12.3) | 0.11 |
| BMI (kg/m2) | 26.8 (±5.6) | 27.0 (±5.1) | |
| Median (IQR) | Median (IQR) | ||
| Exacerbations/year | 2% (1.0-3.0) | 1.4 (0.7-3.0) | 0.40 |
| Sex (Males) | 69.9 | 62.6 | 0.36 |
| Chronic bronchitis | 54.3 | 54.5 | 0.98 |
| Smoking at recruitment | 35.6 | 32.0 | 0.77 |