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Table 1 Subcategories of irritant-induced OA

From: Bronchial asthma and COPD due to irritants in the workplace - an evidence-based approach

Subcategories of irritant-induced OA Exposure concentration Duration of exposure
Reactive airways dysfunction syndrome (RADS) Extremely high, > OEL ≤1 day
Not so sudden onset of irritant-induced OA Moderate, around OEL >1 day <4 months
Low dose irritant-induced OA Low, below OEL >4 months
  1. OA = Occupational asthma, OEL = Occupational Exposure Limit.