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Correlation of 4-Meter Gait Speed with Clinical Indicators of Chronic Obstructive Pulmonary Disease

Takako Nakano, Shinichi Kimura, Takafumi Yamashita,Michihiro Yoshimi,Yoshiaki Tao,Shohei Takata

Respiratory Investigation(2021)

Natl Hosp Org Fukuokahigashi Med Ctr

Cited 6|Views5
Abstract
Background: Measuring daily physical activity and exercise capacity is recommended in the routine care of patients with chronic obstructive pulmonary disease (COPD). The 4-m gait speed (4mGS) is simple and effective in stratifying patients according to exercise performance, dyspnea, health status, and prognosis. We assessed the reliability of the 4mGS as a clinical marker by examining its association with established clinical indicators among hospitalized patients with COPD. Methods: This retrospective study included 78 patients hospitalized with COPD (mean age: 76.3 +/- 0.9 years; males, n = 69) between January 2016 and June 2018 who were assessed using the 4mGS and divided into slow (<0.8 m/s) and normal (>= 0.8 m/s) 4mGS groups. Clinical characteristics were compared, including death during the observation period, time to first exacerbation, and long-term oxygen therapy requirement. Results: There were strong relationships between 4mGS performance, the 6-min walk test (R = 0.70; p < 0.0001), and the modified Medical Research Council dyspnea scale (R = 0.68; p < 0.0001) among the 78 patients. The slow 4mGS group had a higher frequency of death during the observation period (p = 0.0095) and a greater requirement for long-term oxygen therapy (p = 0.0063). The 4mGS correlated with inspiratory capacity (IC) and IC/total lung capacity ratios, which are respiratory failure indicators. Conclusions: The 4mGS is a simple and easy method of assessing the physical condition as well as estimating the prognosis of patients with COPD, and may serve as a useful marker in home medical treatment or clinical settings. (C) 2021 The Japanese Respiratory Society. Published by Elsevier B.V. All rights reserved.
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4-m gait speed,6-min walk test,Chronic obstructive pulmonary disease,Mortality,Long-term oxygen therapy
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