Investigation of time profile of FEV1 across the onset of potential COPD: a retrospective cohort study using medical checkup data in Japan

Authors :: Masaru Suzuki
Isao Matsumoto
Masato Ishida
Yoshiharu Horie
Hideyuki Ban
Wataru Takeuchi
Shunki Nakagawa
Tohru Nakagawa
Tetsuhisa Kitamura
Shigeo Muro
Source :: Scientific Reports, Vol 13, Iss 1, Pp 1-8 (2023)
Publication Year :: 2023
Publisher :: Nature Portfolio, 2023.
Abstract: Abstract This study compared the time profile of FEV1 after COPD diagnosis among rapid decliners, slow decliners, and sustainers in the year of COPD diagnosis. COPD subjects were identified from the annual medical checkup records of Hitachi, Ltd., employees in Japan (April 1998-March 2019). Subjects were categorized into 3 groups (rapid decliner [decrease of FEV1 ≥ 63 mL/year], slow decliner [

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