Table 1 Demographics, smoking habit, presence of comorbid disorders and chronic treatment other than that for COPD according to final COPD diagnosis (N = 227)
Variables | All (N = 227) | COPD (n = 43) | Non-COPD (n = 184) | Statistics |
|---|---|---|---|---|
Women (%) | 115 (50.7) | 17 (39.5) | 99 (53.2) | χ2 = 2.711, P = 0.100 |
Age (years), mean ± SD | 52.5 ± 6.8 | 53.6 ± 7.0 | 52.3 ± 6.7 | t = 1.139, P = 0.256 |
BMI (kgm−2), mean ± SD | 26.5 ± 4.2 | 26.5 ± 5.2 | 26.5 ± 3.9 | t = 0.100, P = 0.921 |
Active smokers (%) | 185 (84.9) | 32 (84.2) | 153 (85.0) | χ2 = 0.015, P = 0.902 |
Years of smoking, mean ± SD | 30.6 ± 6.9 | 32.0 ± 6.4 | 30.3 ± 6.9 | z = 1.641, P = 0.101 |
Cigarettes/day, mean ± SD | 24.6 ± 9.1 | 24.4 ± 8.0 | 24.6 ± 9.2 | z = 0.241, p = 0.809 |
Pack-years, mean ± SD | 37.9 ± 17.4 | 39.1 ± 14.3 | 37.5 ± 17.5 | z = 1.310, p = 0.190 |
Presence of comorbid disorders (%) | 126 (55.5) | 22 (51.2) | 104 (56.5) | χ2 = 0.049, P = 0.825 |
Chronic treatment (%) | 99 (43.6) | 16 (37.2) | 83 (45.1) | χ2 = 0.125, P = 0.724 |