PT - JOURNAL ARTICLE AU - Chieko Yoshida AU - Hideharu Ideguchi AU - Aiko Masunaga AU - Keisuke Kojima AU - Susumu Hirosako AU - Hidenori Ichiyasu AU - Kazuiko Fujii AU - Hirotsugu Kohrogi TI - Four-meter gait speed is useful to detect daily activity level in chronic respiratory diseases AID - 10.1183/13993003.congress-2015.PA3559 DP - 2015 Sep 01 TA - European Respiratory Journal PG - PA3559 VI - 46 IP - suppl 59 4099 - http://erj.ersjournals.com/content/46/suppl_59/PA3559.short 4100 - http://erj.ersjournals.com/content/46/suppl_59/PA3559.full SO - Eur Respir J2015 Sep 01; 46 AB - Background: In chronic respiratory diseases, it is difficult to evaluate daily exercise tolerance, physical activity and profile of oxygenation. While those evaluations are important to maintain their QOLs, those studies have not been fully performed except COPD.Aims & Methods: To investigate a predictor of daily activity and near respiratory failure in outpatient routine practice, we evaluated 4-meter gait speed (4MGS), 6MWD and pulmonary function testing in our outpatient clinic, and 24-hour pulse oximetry monitoring, daytime step counts and duration of physical activity by using electronic accelerometer in community-living 24 patients with stable chronic respiratory diseases (interstitial pneumonia 17 patients, COPD 4, CPFE 3, respectively) not receiving supplemental oxygen. We analyzed the relationship among the values.Results: The mean PaO2 at rest was 81.9 Torr ranged from 63.3 to 95.4 Torr. The daily step counts and duration of activity time were strongly correlated with %FEV1 (p=0.001), and the step counts were correlated with 4MGS, 6MWD (p=0.034, p=0.039, respectively). The mean %diurnal time with SpO2<90% was only 4.3%, while there were 13/24 case (54.2%) that observed lowest SpO2<90% during the 6MWD.Conclusion: %FEV1, 4MGS and 6MWD were useful to detect daily activity level. This study also suggested that patients with near chronic respiratory failure reduce their daily physical activity to avoid the oxygen de-saturation without awareness. We need to predict their daily activity by testing 4MGS and 6MWD with measuring SpO2,even if SpO2>90% at rest and on ambulatory pulse oximetry monitoring in their daily life.