Prevalence, characteristics and significant predictors for cardiovascular disease of patients with preserved ratio impaired spirometry: A 10-year prospective cohort study in China

This study was undertaken to determine the prevalence and characteristics of patients with PRISm in the Chinese population, including significant predictive factors for cardiovascular disease in those with PRISm. The study included 6994 subjects aged 35–70 years, with spirometric measurements (FEV1, FVC, FEV1/FVC ratio) collected using a Vitalograph dry wedge spirometer.