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Locomotion and Global Positioning System in Arterial Disease (Starter-GPS)

This study has been completed.
Société Française de Médecine Vasculaire
Information provided by (Responsible Party):
University Hospital, Angers Identifier:
First received: June 11, 2007
Last updated: June 28, 2012
Last verified: April 2010
The maximal walking distance (MWD) performed on treadmill (TT) remains the gold standard in estimating the walking capacity of patients suffering from peripheral arterial disease (PAD) 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 PAD patients.

Condition Intervention
Peripheral Arterial Disease
Procedure: Recording of GPS during a free walking in a public park

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Diagnostic
Official Title: Study of Human Locomotion With Global Positioning System. Application to Patients With Peripheral Arterial Disease

Resource links provided by NLM:

Further study details as provided by University Hospital, Angers:

Primary Outcome Measures:
  • Validate the ability of GPS to detect walking and resting bouts and to accurately estimate walking speed and distance in normal subjects. [ Time Frame: 2 years ]
  • Measurement of maximal walking distance using GPS and comparison with treadmill measurement in PAD patients. [ Time Frame: 2 years ]

Secondary Outcome Measures:
  • Determine the variability of the walking capacity and its potential determinants in PAD patients. [ Time Frame: 3 years ]
  • Analyse the reliability and sensibility of GPS measurements of the walking capacity in PAD patients. [ Time Frame: 4 years ]
  • Analyse potential factors that could affect the accuracy of GPS measurements [ Time Frame: 4 years ]

Enrollment: 140
Study Start Date: March 2006
Study Completion Date: December 2010
Primary Completion Date: December 2010 (Final data collection date for primary outcome measure)
Intervention Details:
    Procedure: Recording of GPS during a free walking in a public park
    Analyse the clinical change after surgery from GPS measurements and compare it with laboratory measurement.
Detailed Description:

The study has two main objectives, conducted together. Each objective include several phases.

Objective 1: technical validation of GPS measurements in healthy subjects.

phase 1: technical validation of a GPS device to study outdoor walking (completed).

phase 2: comparison and use of various GPS devices (intra- and inter-GPS variability) in the study outdoor walking (on-going).

phase 3: study of several factors that could influence accuracy of GPS measurements as walking speed, environment, sampling frequency and others technical features as the WAAS/EGNOS function (on-going).

Objective 2: Application in PAD patients to study walking capacity under free-living conditions

phase 1: comparison of GPS measurements (maximal walking distance) with the gold standard treadmill measurement of maximal walking distance (completed).

phase 2: analysis of the variability of the walking capacity under free-living conditions from GPS measurements (completed).

phase 3: study of reliability and sensibility (effect of treatment) of GPS measurements (on-going).

phase 4: study of the relationship between laboratory measurements of walking capacity and GPS-derived parameters.


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Ankle to Brachial Index (ABI) < 0.95 for PAD patients
  • Age > 18 years old
  • Able to walk on treadmill

Exclusion Criteria:

  • limb pain of potential non-vascular origin
  • myocardial infraction in the last six months
  • uncontrolled angina pectoris
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Please refer to this study by its identifier: NCT00485147

Centre hospitalier universitaire
Angers, France, 49933
Sponsors and Collaborators
University Hospital, Angers
Société Française de Médecine Vasculaire
Study Director: Pierre Abraham, MD, PhD Laboratory for Vascular Investigations. University Hospital. Angers. France.
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: University Hospital, Angers Identifier: NCT00485147     History of Changes
Other Study ID Numbers: CP 2005-04
Study First Received: June 11, 2007
Last Updated: June 28, 2012

Keywords provided by University Hospital, Angers:
peripheral arterial disease
Walking impairment

Additional relevant MeSH terms:
Peripheral Arterial Disease
Peripheral Vascular Diseases
Arterial Occlusive Diseases
Vascular Diseases
Cardiovascular Diseases processed this record on April 28, 2017