Table 1

General characteristics of patients and controls

COPD patients (FEV1 <50%) (n=60)COPD patients (FEV1 50–80%) (n=102)Controls (n=359)
NHS=National Health Service.
Male sex44 (73.3%)72 (70.6%)145 (40.4%)
Low education52 (88.1%)85 (85.0%)274 (80.1%)
Living alone10 (16.7%)30 (29.4%)92 (25.8%)
NHS insurance45 (75.0%)77 (76.2%)246 (68.5%)
Comorbidity36 (65.5%)66 (71.0%)179 (57.0%)
Mean (SD) age (years)67.8 (8.7)66.2 (10.3)65.6 (12.8)
Mean (SD) reversibility FEV1 (%)4.2 (4.1)5.6 (3.9)