Bronchiectasis show various ventilatory disorders in pulmonary function. The characteristics and severity of patients with bronchiectasis according to these pulmonary dysfunctions are still very limited. This study aimed to evaluate the clinical, radiologic feature and the disease severity of patients with bronchiectasis according to spirometric patterns. We retrospectively evaluated 506 patients with bronchiectasis who underwent pulmonary lung function test (PFT) at a referral hospital between 2014 to 2021. Cylindrical type was the most common (70.8%) type of bronchiectasis on chest CT, and 70% of patients had bilateral lung involvement. Of the 506 patients, Obstructive ventilatory disorder was the most common (51.6%), followed by normal ventilation (30%) and restrictive ventilatory disorder (18.4%). mMRC was highest in patients with obstructive ventilatory disorders, Modi ed Reiff score (6 (3-10), P < 0.001), FACED score (3 (1-4), P < 0.001), and BSI score (8 (5-11), P < 0.001) also showed signi cantly highest values of obstructive ventilatory disorder rather than restrictive ventilatory disorder and normal ventilation. More than half of patients with bronchiectasis had obstructive ventilatory disorder. Bronchiectasis with obstructive ventilatory disorders has more dyspnea symptom, more disease severity and more radiologic severity. There was no signi cant association between spirometric pattern and radiologic type, but the more severe the radiologic severity, the more severe the lung function impairment.
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