Table 1 Main characteristics of the subjects at risk for AO.
From: Incidence trends of airflow obstruction among European adults without asthma: a 20-year cohort study
N° of subjects | Males | Females |
|---|---|---|
3,076 | 3,192 | |
Age at baseline (years), mean (range) | 36 (25–48) | 36 (25–47) |
Subjects who participated and had valid lung function measurements at all examinations, % | 59.5 | 60.6 |
Duration of the follow-up (years)*, mean (range) | 15 (1–20) | 15 (1–20) |
Ever smokers at baseline and/or follow-up, % | 65.9 | 56.5 |
N° of lifetime pack-years among ever smokers, median (IQR) | 20 (9–34) | 12 (4–23) |
Pre-bronchodilator FEV1/FVC(%), mean ± s.d. | ||
1st examination (baseline) | 79.8 ± 5.1 | 83.2 ± 5.2 |
2nd examination | 77.3 ± 5.6 | 78.8 ± 5.7 |
3rd examination | 75.2 ± 5.6 | 76.2 ± 5.2 |
