Table 1 Demographic data at baseline according to participation in follow-up
Total | Follow-up visit | P-value | ||
|---|---|---|---|---|
n = 120 | Yes (n = 62) | No (n = 58) | ||
Demographic data | ||||
Male, n (%) | 61 (51) | 35 (57) | 26 (45) | 0.20 |
Age, years, mean (SD) | 54.9 (9.7) | 55.8 (9.5) | 53.9 (9.8) | 0.12 |
Height, m, mean (SD) | 1.74 (0.1) | 1.75 (0.1) | 1.72 (0.11) | 0.18 |
Weight, kg, mean (SD) | 79.7 (16.6) | 81.6 (15.1) | 77.6 (18.2) | 0.30 |
BMI, kg/m2, mean (SD) | 26.2 (4.3) | 26.5 (4.0) | 26.0 (4.6) | 0.35 |
Smoking history | ||||
Pack-years, mean (SD) | 8.1 (12) | 9.9 (14.4) | 6.2 (8.6) | 0.10 |
Current, n (%) | 25 (21) | 10 (17) | 15 (28) | 0.15 |
Quitters, n (%) | 29 (24) | 18 (30) | 11(20) | 0.24 |
Never smokers, n (%) | 60 (50) | 32 (53) | 28 (48) | 0.87 |
Unknown, n (%) | 6 (5) | 2 (3) | 4 (7) | 0.36 |
Spirometry, mean (SD) | ||||
FEV1, % of predicted | 102 (15) | 101 (14) | 102 (15) | 0.74 |
FVC, l | 4.2 (1.2) | 4.3 (1.2) | 4.2 (1.2) | 0.49 |
FVC, % of predicted | 110 (14) | 109 (15) | 111 (14) | 0.46 |