TABLE 1.
Description of the Study population.
| Characteristics | Lifelines(general) | N | Lifelines(asthma) | N | VLW‐VLD(general) | N | DAG (asthma) | N |
|---|---|---|---|---|---|---|---|---|
| Population | General | 32,817 | Asthma patients | 2923 | General | 1554 | Asthma patients | 917 |
| Age (y). Mean (min‐max) | 42.9 (18–90) | 32,817 | 40 (18–80) | 2923 | 52.9 (35–80) | 1554 | 34 (5–75) | 917 |
| Gender. Male (%) | 40.8 | 32,817 | 40 | 2923 | 46.7 | 1554 | 46.9 | 917 |
| Blood eosinophils log (ul/cell). Mean (SD) | 2.17 (0.27) | 32,252 | 2.25 (0.28) | 2861 | 2.17 (0.27) | 1515 | 2.18 (0.43) | 769 |
| FEV1(L). Mean (SD) | 96 (12.6) | 22,785 | 91 (13.7) | 2042 | 86.6 (14.39) | 1440 | 86.3 (20.7) | 898 |
| FEV1/FVC. Mean (SD) | 0.77 (0.07) | 22,789 | 0.75 (0.09) | 2043 | 0.73 (0.09) | 1440 | 0.79 (0.1) | 263 |
| Total IgE log (kU/L). Mean (SD) | n.a. | n.a. | 1.43 (0.59) | 1465 | 2.11 (0.66) | 772 | ||
| Skin prick test positivity (%) | n.a. | n.a. | 219 (15.3) | 1428 | 577 (85.2) | 677 | ||
| AHR slope log (SD) | n.a | n.a. | 0.7 (0.73) | 435 | 3.17 (1.44) | 728 | ||
| Childhood onset asthma a N (%) | 599 (75.9) | 789 | n.a. | n.a. | 578 (80.4) | 719 |
Abbreviations: N, number of subjects data field available for; n.a, not available; SD, standard of deviation.
a
Childhood onset asthma defined as a diagnosis occurring before the age of 18.