Association between preserved ratio impaired spirometry and sleep apnea in a Chinese community

This analysis used baseline data from a prospective cohort study to examine the relationship between obstructive sleep apnea and PRISm in a community-based population of 1183 individuals aged 40–75 years in China. As part of the study, FEV1 and FEV6 were measured using the Vitalograph COPD-6 portable respiratory monitor.