Prevalence and risk factors for COPD in subjects with preserved ratio impaired spirometry by Akihito Yokoyama, Rina Kanetake, Kazufumii Takamatsu, Kaechang Park

“…COPD was defined as a forced expiratory volume in 1 s (FEV1):forced vital capacity (FVC) ratio <lower limit of normal (LLN), and PRISm was defined as an FEV1:FVC ratio >LLN and per cent forced expiratory volume in 1 s (%FEV1) (FEV1/predicted FEV1) of <80% without bronchodilators in this study.Results Of 1672 subjects (mean age±SD 56.5±9.5), 976 (58.4%) were male. …”
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