Fig. 4From: Proportions and risk factors of chronic obstructive pulmonary disease and preserved ratio impaired spirometry, and association with small airway disease, in the positive screening older population from China: a cross-sectional studyImpact factors related to COPD and PRISm. Abbreviations: COPD:Chronic obstructive pulmonary disease; PRISm:Preserved ratio impaired spirometry; BMI:Body mass index; COPD-SQ:COPD screening questionnaire; CAT:COPD assessment testBack to article page