Document Detail

Measurement of walking distance and speed in patients with peripheral arterial disease: a novel method using a global positioning system.
MedLine Citation:
PMID:  18250268     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The maximal walking distance (MWD) performed on a treadmill test remains the "gold standard" in estimating the walking capacity of patients who have peripheral arterial disease with intermittent claudication, although treadmills are not accessible to most physicians. We hypothesized that global positioning system (GPS) recordings could monitor community-based outdoor walking and provide valid information on walking capacity in patients with peripheral arterial disease. METHODS AND RESULTS: We studied 24 patients (6 women) with arterial claudication (median [25th to 75th percentile] values: 57 years old [48 to 67 years], 169 cm tall [164 to 172 cm], weight 81 kg [71 to 86 kg], and ankle-brachial index 0.64 [0.56 to 0.74]). MWD on the treadmill was 184 m (144 to 246 m), which was compared with the results of self-reported MWD, the distance score from the Walking Impairment Questionnaire, MWD observed during a 6-minute walking test, and MWD measured over a GPS-recorded unconstrained outdoor walk in a public park. Self-reported MWD, Walking Impairment Questionnaire distance score, 6-minute walking test score, and GPS-measured MWD were 300 m (163 to 500 m), 28% (15% to 47%), 405 m (338 to 441 m), and 609 m (283 to 1287 m), respectively. The best correlation with MWD on the treadmill test was obtained with the MWD measured by the GPS (Spearman r=0.81, P<0.001). CONCLUSIONS: Outdoor walking capacity measured by a low-cost GPS is a potentially innovative way to study the walking capacity of patients with peripheral arterial disease. It opens new perspectives in the study of walking capacity for vascular patients with claudication under free-living conditions or for physicians who do not have a treadmill.
Alexis Le Faucheur; Pierre Abraham; Vincent Jaquinandi; Philippe Bouyé; Jean Louis Saumet; Bénédicte Noury-Desvaux
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Validation Studies     Date:  2008-02-04
Journal Detail:
Title:  Circulation     Volume:  117     ISSN:  1524-4539     ISO Abbreviation:  Circulation     Publication Date:  2008 Feb 
Date Detail:
Created Date:  2008-02-20     Completed Date:  2008-03-17     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0147763     Medline TA:  Circulation     Country:  United States    
Other Details:
Languages:  eng     Pagination:  897-904     Citation Subset:  AIM; IM    
Laboratory of Physiology, CNRS, UMR6214, INSERM U771, Medical School, University of Angers, Angers, France.
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MeSH Terms
Disability Evaluation*
Exercise Test / instrumentation,  methods*
Geographic Information Systems*
Intermittent Claudication / diagnosis,  physiopathology
Middle Aged
Peripheral Vascular Diseases / diagnosis,  physiopathology*
Severity of Illness Index
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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