Variables | Total | COPD | Non-COPD | |
---|---|---|---|---|
N (%) | 138 | 38 (27) | 100 (73) | |
Age | ||||
Years, mean [95%CI] | 55 [54-57] | 62 [59-64] | 53 [51-55] | |
Agegroup 40-54 years n (%) | 62 | 5 (13) | 57 (57) | |
Agegroup 55-70 years n (%) | 76 | 33 (87) | 43 (43) | |
Smoking intensity | ||||
Pack years*, mean [95%CI] | 24 [22-26] | 32 [27-36] | 21 [19-24] | |
Pack years*, median [range] | 20 [5-75] | 31 [5-75] | 20 [5-56] | |
Smoking status | ||||
Current smokers, n (%) | 73 | 25 (65.8) | 48 (48.0) | |
Former smokers, n (%) | 65 | 13 (34.2) | 52 (52.0) | |
Diagnosis | ||||
Upper resp. infection, n (%) | 57 | 15 (39.5) | 42 (42.0) | |
Lower resp. infection, n (%) | 79 | 23 (60.5) | 56 (56.0) | |
Viral infection/influenza, n (%) | 2 | 0 (0) | 2 (2.0) | |
Sex | ||||
Female, n (%) | 19 (50) | 58 (58) | ||
Male | 19 (50) | 42 (42) | ||
Spirometry | ||||
FEV1% of predicted, mean [95%CI] | 95.7 [92.6-98.8] | 77.5 [71.2-84.0] | 102.6 [100.2-105.1] | |
FEV1/FVC ratio, mean [95%CI] | 0.73 [0.71-0.75] | 0.60 [0.57-0.63] | 0.78 [0.77-0.79] | |
COPD severity** | N | % | ||
Stage 1 (mild, FEV1 ≥ 80% of predicted) | 17 | (44.7) | ||
Stage 2 (moderate, 50% ≤ FEV1 < 80% of predicted) | 20 | (52.6) | ||
Stage 3 (severe, 30% ≤ FEV1 < 50% of predicted) | 1 | (2.6) | ||
Stage 4 (very severe, FEV1 < 30% of predicted) | 0 | (0) |