Positive PEF | Negative PEF | |
Subjects n | 101 | 36 |
Males/females n | 72/29 | 20/16 |
Gold-standard diagnostic test % | ||
Specific challenge test | 67.3 | 72.2 |
4‐fold change in reactivity | 8.9 | 8.3 |
Specific IgE | 21.8 | 19.4 |
On inhaled steroids % | 69.6 | 61.9 |
HMW agent cause of OA % | 10.9 | 30.6 |
Main cause of OA n | ||
Metals | 21 | 7 |
Latex | 6 | |
Biocides | 16 | 3 |
Flour | 5 | |
Isocyanates | 11 | 3 |
Oil mists | 6 | |
Colophony | 5 | |
TGIC | 4 | |
Chloramines | 3 |
IgE: immunoglobulin E
HMW: high-molecular-weight
OA: occupational asthma
TGIC: triglycidyl isocyanurate
#: Oasys‐2 score >2.5
¶: Oasys‐2 score ≤2.5
+: some subjects had more than one PEF record