Table 2.
Clinical characteristics of sample population
| Variables | Clinical parameters | COPD-X/GOLD | GLI-2012 |
| n=238 | n=238 | ||
| Sex | Male | 127 (53%) | 123 (52%) |
| Age | Years (mean (95% CI)) | 54.67 (53.13 to 56.2) | 52.69 (51.15 to 54.23) |
| Corpulence data and status | BMI (median (IQR)) | 22.86 (19.38–27.89) | 22.91 (19.04–27.89) |
| Underweight (BMI <18.5 kg/m2) | 48 (20%) | 51 (22%) | |
| Normal weight (BMI 18.5–24.9 kg/m2) | 99 (42%) | 95 (40%) | |
| Overweight (BMI 25–29.9 kg/m2) | 50 (21%) | 49 (21%) | |
| Obese (BMI ≥30 kg/m2) | 40 (17%) | 42 (18%) | |
| Smoking status | Never smoker | 20 (8%) | 17 (7%) |
| Former smoker | 95 (40%) | 98 (41%) | |
| Current smoker | 123 (52%) | 123 (52%) | |
| Smoking pack years (median (IQR)) | 21.5 (7–40) | 20 (6.13–40) | |
| Mortality | Deceased (all cause) | 38 (16%) | 35 (15%) |
| Deceased age (years) (mean (95% CI)) | 57.79 (53.97 to 61.61) | 57.15 (53.08 to 61.22) | |
| COPD | Clinical history of COPD | 161 (70%) | 156 (68%) |
Fifteen patients were identified via FEV1/FVC <0.7 who were not identified via FEV1/FVC <LLN, and vice versa 15 patients were identified via FEV1/FVC >LLN and not by FEV1/FVC <0.7.
BMI, body mass index; COPD, chronic obstructive pulmonary disease; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity; GLI, global lung function imitative; GOLD, global initiative for chronic obstructive lung disease; LLN, lower-limit of normal.