Characteristics of the sample*
| Participants meeting the inclusion criteria, n | 13 957 |
| Years of follow-up, mean (SD) | 14.7 (11.7) |
| Person-years represented in the analysis | 205 498 |
| Participants reporting any year in an asthma trigger occupation, n (%) | 5906 (42.3) |
| Years in asthma trigger occupations, all participants, mean (SD) | 2.3 (4.9) |
| Years in asthma trigger occupations, participants with ≥1 year, mean (SD) | 6.1 (6.4) |
| Ever reported an asthma diagnosis, ages 18–65, % (SD) | 16.9 (24.4) |
*Data source: Panel Study of Income Dynamics, 1968–2015.