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Eur J Vasc Endovasc Surg. 2013 Feb;45(2):162-7. doi: 10.1016/j.ejvs.2012.11.027. Epub 2012 Dec 20.

Free-living physical activity as a novel outcome measure in patients with intermittent claudication.

Author information

1
The School of Health and Life Sciences, Glasgow Caledonian University, Glasgow G4 0BA, Scotland, UK. clare.clarke@gcu.ac.uk

Abstract

OBJECTIVE:

To develop a method of event-based analysis that quantifies the fragmented nature of walking bouts in individuals with intermittent claudication [IC] and compare outcomes with age and gender-matched healthy controls.

DESIGN:

Cross-sectional.

MATERIALS:

The activPAL™ physical activity monitor.

METHODS:

7-day physical activity patterns were compared between individuals with IC (n = 30) and controls matched for age and gender (n = 30). The ratio of the number of walking events to upright events was calculated to provide an event-based claudication index (EBCI) that represented the fragmented nature of walking bouts commonly reported in those with IC.

RESULTS:

Individuals with IC had a greater EBCI than age matched controls indicating a more fragmented walking pattern (5.8 ± 2.0 vs. 7.7 ± 3.1, p < 0.01). The difference between groups was more pronounced when the EBCI was calculated from upright events that included >400 steps (23.4 ± 11.3 vs. 35.8 ± 14.2, p < 0.01).

CONCLUSION:

The classic fragmented stop/start walking pattern universally described by individuals with IC can be quantified using the EBCI. This method of measurement potentially provides a novel method of assessing the effectiveness of clinical interventions for this patient group.

PMID:
23265683
DOI:
10.1016/j.ejvs.2012.11.027
[Indexed for MEDLINE]
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