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Table 2 Oasys protocol and interpretation

From: Assessment of work-related asthma prevalence, control and severity: protocol of a field study

Part of the study Duration of PEF measurements period Used indexes Interpretation
Epidemiological 2 weeks 20% daily variation of PEF Active asthma
Clinical 4–6 weeks Oasys score >2.5 : in favor of OA
1.5–2.5 in favor of WEA
<2.4: in disfavor of WEA