Agreement in gait speed from smartphone and stopwatch for five meter walk in laboratory and clinical environments

Rahul Soangra, Thurmon E. Lockhart

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

Gait speed is suggested as an independent predictor of post-operative morbidity and mortality in elderly cardiovascular disease (CVD) patients. Society of thoracic surgeons has recently classified gait speed as the only important indicator of health for CVD patients. It has been seen that patients with slow gait speed above 70 years of age, taking more than 6 seconds to walk 5 meters are particularly at high risk for adverse outcomes. Twelve young participants walked in their self-selected, slow and fast speed with five reflective markers at sternum and heels and toes of both feet in laboratory environment. A smartphone was affixed at the pelvis using a smartphone holster. Simultaneously, an examiner used stopwatch to record the elapsed time necessary to cross 5 meter distance. Smartphone based app also computed gait speed. Intra-class correlation coefficients comparing velocities from camera system, smartphone and stopwatch systems were found to be highly reliable (ICC (3,k)=0.82) for slow walking speed. Similarly, fairly good reliability were found for fast (ICC(3,k)=0.70) and normal walking speed (ICC(3,k)=0.66). Five CVD patients were tested in clinical environment with smartphone and its feasibility was assessed for gait speed. This study shows that the smartphone and stopwatch gait speed methods have clinically acceptable agreement for the measurement of gait velocity in the two different environments. The smartphone based reliable measurements could help patients on their own to assess operative risks and health during perioperative period.

Original languageEnglish (US)
Title of host publication51st Annual Rocky Mountain Bioengineering Symposium, RMBS 2014 and 51st International ISA Biomedical Sciences Instrumentation Symposium 2014
PublisherISA - Instrumentation, Systems, and Automation Society
Pages254-264
Number of pages11
ISBN (Print)9781632663917
StatePublished - Jan 1 2014
Externally publishedYes
Event51st Annual Rocky Mountain Bioengineering Symposium, RMBS 2014 and 51st International ISA Biomedical Sciences Instrumentation Symposium 2014 - Denver, CO, United States
Duration: Apr 4 2014Apr 6 2014

Publication series

Name51st Annual Rocky Mountain Bioengineering Symposium, RMBS 2014 and 51st International ISA Biomedical Sciences Instrumentation Symposium 2014

Other

Other51st Annual Rocky Mountain Bioengineering Symposium, RMBS 2014 and 51st International ISA Biomedical Sciences Instrumentation Symposium 2014
CountryUnited States
CityDenver, CO
Period4/4/144/6/14

Keywords

  • Cardiovascular disease CVD
  • Gait speed
  • Inertial sensors

ASJC Scopus subject areas

  • Bioengineering
  • Biomedical Engineering
  • Instrumentation

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  • Cite this

    Soangra, R., & Lockhart, T. E. (2014). Agreement in gait speed from smartphone and stopwatch for five meter walk in laboratory and clinical environments. In 51st Annual Rocky Mountain Bioengineering Symposium, RMBS 2014 and 51st International ISA Biomedical Sciences Instrumentation Symposium 2014 (pp. 254-264). (51st Annual Rocky Mountain Bioengineering Symposium, RMBS 2014 and 51st International ISA Biomedical Sciences Instrumentation Symposium 2014). ISA - Instrumentation, Systems, and Automation Society.