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
From: Influence of weather and atmospheric pollution on physical activity in patients with COPD
|  | 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) |  |
| Â | Median (IQR) | Median (IQR) | Â |
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 |