Values expressed as deviation or as measures of frequency, as appropriate. % of predicted value according to different prediction equations. SpO2 at the end of the %, or 4-point drop of initial SpO2. BMI: body mass index; FVC: forced vital capacity; FEV1: forced expiratory volume in the first second; SpO2: peripheral oxygen saturation; mMRC: Medical Research Council; SAH: systemic arterial hypertension; CCI: Charlson’s comorbidity index; ICS: inhaled corticosteroid; LABA: long-acting beta agonist; SABA: short-acting beta agonist; LAMA: long-acting muscarinic antagonist; SAMA: short-acting muscarinic antagonist.