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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