Fig. 3
From: Assessment of work-related asthma prevalence, control and severity: protocol of a field study
Decision tree for the diagnosis of work-related asthma. BHR: Bronchial hyperresponsiveness; PEF: Peak Expiratory Flow; SPT: Skin Prick-Tests; OA: Occupational asthma; WEA: Work-exacerbated asthma; NWRA: Non Work1Related Asthma; NSBHR: Non Specific Bronchial Hyperresponsiveness; *Specific Inhalation Challenge [33] is done according to the center’s means and if an occupational allergen is identified; **One test after at least 2 consecutive working weeks and another test after at least 10 days away from work; ***between before and after the specific bronchial provocative test