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Göteborgs universitets publikationer

Reliability and validity of the physiological cost index compared with oxygen consumption for estimation of energy cost after stroke

Författare och institution:
Anna Danielsson (Institutionen för neurovetenskap och fysiologi, sektionen för klinisk neurovetenskap och rehabilitering); Carin Willén (Institutionen för neurovetenskap och fysiologi, sektionen för klinisk neurovetenskap och rehabilitering); Katharina S Sunnerhagen (Institutionen för neurovetenskap och fysiologi, sektionen för klinisk neurovetenskap och rehabilitering)
Publicerad i:
4th World Congress of the International Society of Physical and Rehabilitation Medicine, June 10-14, 2007, Seoul, Korea,
Konferensbidrag, refereegranskat
Sammanfattning (abstract):
The energy cost of walking is often increased after stroke, which might restrict participation in daily activities. Effects of walking aids or orthoses on the energy cost need to be evaluated. Oxygen consumption (VO2) is the standard for measurement of energy cost is, but in clinical practise methods must be simple. The Physiological Cost Index (PCI) based on heart rate and walking speed gives an estimate of energy cost. The reliability and validity of PCI for persons with stroke has not been documented. The aim was to investigate the test retest reliability and validity of PCI in comparison with VO2, in persons with stroke and healthy persons. A convenience sample of 20 persons with hemiparesis > 6 months after stroke and 16 healthy persons were included. VO2 and heart rate were registered during five minutes of treadmill walking at the self-selected speed. Measurements were repeated within one week. Eleven of the stroke participants were measured with and without an ankle foot orthosis. PCI showed a larger dispersion than VO2 of differences between test and retest. Changes in PCI of 74% and 53% in the stroke and healthy groups respectively, were necessary for a “true” difference on retest, compared to 22% and 21% respectively for VO2. The regression analysis for PCI showed that the model including age, sex, group assignment and VO2 could explain 53 % of the variation. PCI did not show any difference between walking with or without an orthosis, whereas VO2 differed significantly. In persons with stroke as well as healthy persons, energy cost measured by the Physiological Cost Index showed limited reliability and validity compared to measurement of oxygen consumption. The Physiological Cost Index might be used as a rough estimate on the individual level, but for study purposes measurement of oxygen consumption seems more accurate.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Klinisk medicin ->
Hälsovetenskaper ->
Postens nummer:
Posten skapad:
2010-04-22 11:40
Posten ändrad:
2013-02-18 20:39

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