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Shu Hashimoto1,2 ,†Yuri Yoshida,3 Naoyuki Makita,3 Ryoko Sorimachi,3 Satoko Sugaya,4 Yoshifumi Arita,3 Nobuya Hayashi,4 Naoki Tashiro,3 Masakazu Ichinose5,6 1Nihon University, Tokyo, Japan; 2Hibiya Kokusai Clinic, Tokyo, Japan; 3Medical Department, AstraZeneca K.K., Osaka, Japan; 4R&D, AstraZeneca K.K., Osaka, Japan; 5Academic Center of Osaki Citizen Hospital, Miyagi, Japan; 6Department of Respiratory Medicine, Tohoku University Graduate School of Medicine, Miyagi, Japan†Dr Shu Hashimoto passed away on July 03, 2022Correspondence: Masakazu Ichinose, Academic Center of Osaki Citizen Hospital, 3-8-1 Honami, Furukawa, Osaki, 989-6183, Japan, Tel +81-229-23-3311, Fax +81-229-23-5380, Email ichinose@h-osaki.jpIntroduction: The ACO Japan Cohort Study, a multicenter observational study, investigated the proportion of patients with chronic obstructive pulmonary disease (COPD) who met the Japanese Respiratory Society (JRS) asthma–COPD overlap (ACO) diagnostic criteria, characteristics of ACO and non-ACO patients, and the patient transitions between ACO/non-ACO diagnosis over 2 years.Patients and Methods: Patients with COPD were consecutively enrolled between June and December 2018 and followed up continuously for 2 years. All participating study sites were medical institutions where respiratory specialists routinely conducted medical examinations/tests required for ACO diagnosis.Results: Among 708 patients with COPD, 101 (14.3%), 118 (16.7%), and 125 (17.7%) were diagnosed with ACO at registration, 1 year, and 2 years, respectively. In total, 22.6% of patients lacked the data necessary for ACO diagnosis throughout the 2 years. Among patients who had the necessary data for ACO diagnosis, 24.7% were diagnosed with ACO at 2 years. More ACO patients had moderate or severe exacerbations in the past year than non-ACO patients at registration (15.8% vs 6.3%, p = 0.049) and 1 year (19.4% vs 7.6%, p = 0.025). ACO patients had a greater decrease in mean forced expiratory vo

Masakazu Ichinose,1 Yoshiaki Minakata,2 Takashi Motegi,3 Tsuneyuki Takahashi,4 Munehiro Seki,5 Satoko Sugaya,5 Nobuya Hayashi,6 Ichiro Kuwahira7 1Academic Center of Osaki Citizen Hospital, Osaki 989-6183, Japan; 2Respiratory Medicine, National Hospital Organization Wakayama Hospital, Wakayama 644-0044, Japan; 3Respiratory Care Clinic Tokyo, Institute of Clinical Respirology, Tokyo 104-0031, Japan; 4Department of Internal Medicine, Tohoku Medical and Pharmaceutical University Wakabayashi Hospital, Sendai 984-8560, Japan; 5Medical Department, AstraZeneca K.K., Osaka 530-0011, Japan; 6Biometrics Department, AstraZeneca K.K., Osaka 530-0011, Japan; 7Department of Pulmonary Medicine, Tokai University Tokyo Hospital, Tokyo 151-0053, JapanCorrespondence: Masakazu Ichinose Email ichinose@h-osaki.jpPurpose: Patients with chronic obstructive pulmonary disease (COPD) have decreased physical activity (PA) compared with healthy adults. As lower PA is associated with increased mortality, improving PA is an important objective for COPD management. This large-scale, multicenter, non-interventional, cross-sectional study examined the activity status of COPD patients in Japan and explored factors related to PA.Patients and Methods: Outpatients aged ≥ 40 years with confirmed COPD diagnosis and pulmonary function test data were enrolled. Primary study outcomes were measurement of daily steps (over 14 consecutive days, using an activity monitor), assessment of activity time by activity intensity (using metabolic equivalents [METs]), and evaluation of correlation between PA and patient characteristics. Secondary outcomes included further investigation of the influence of patient characteristics on PA.Results: Data from 417 patients with Global Initiative for Chronic Obstructive Lung Disease (GOLD) stages I (29.5%), II (43.9%), III (23.5%), and IV (3.1%) were evaluated. Median (Q1, Q3) daily step count was 3440.8 (1831.3, 5709.3). Median (Q1, Q3) durations of PA at ≥ 3 (mode