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Table 1 International Olympic Committee criteria for the diagnosis of asthma and permission to use of beta-2 agonists: a positive clinical history associated to at least one positive test is required

From: Exercise-induced bronchoconstriction: new evidence in pathogenesis, diagnosis and treatment

Diagnostic procedure Criteria
Pulmonary function FEV1 < 70 %, FEV1/VC <55 %
Bronchodilator test ↑ FEV1 ≥ 12 % or >200 ml
Eucapnic Voluntary Hyperpnea (EVH) ↓ FEV1 ≥ 10 %
Exercise challenge ↓ FEV1 ≥ 10 %
Methacholine challenge ↓ FEV1 ≥ 20 % with a:
PC20 ≤ 4 mg/ml (for subjects not taking ICS)
or
PC20 ≤ 16 mg/ml (for subjects taking ICS for at
least 1 month)
Hyperosmolar test (Mannitol, Saline) ↓ FEV1 ≥ 15 %