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Demographics of study groups.
| Variable | DA+ | AW | DA+ versus AWs (p value) |
|---|---|---|---|
| n | 95 | 142 | |
| Sex (M/F) | 84/11 | 132/10 | 0.2499 |
| Age (years, SEM) | 42.4, 1.24 | 30.4, 0.63 | <0.0001 |
| Exposure (HDI/MDI/TDI) | 53/22/20 | 142/0/0 | <0.0001 |
| Exposure Duration (months, SEM) | 144.6, 14.4 | 65.8, 2.3 | <0.0001 |
| Atopy (Yes/No) | 56/36 | 76/54 | 0.7819 |
| Smoking (Current/Ex/Never) | 16/36/43 | 52/27/63 | <0.0001 |
DA+, exposed workers with SIC confirmed diisocyanate asthma; AW, asymptomatic diisocyanate exposed controls.
