Estimating Exercise Capacity in COPD Patients
Author Information
Author(s): Arnardóttir Ragnheiður Harpa, Emtner Margareta, Hedenström Hans, Larsson Kjell, Boman Gunnar
Primary Institution: Uppsala University
Hypothesis
Can peak exercise capacity be estimated from an incremental shuttle walking test in patients with COPD?
Conclusion
Peak exercise capacity measured by an incremental cycle test could be estimated from an ISWT with similar accuracy as when estimated from peak oxygen uptake in patients with COPD.
Supporting Evidence
- There was a significant correlation between W peak and distance walked on ISWT × body weight (r = 0.88, p < 0.0001).
- The agreement between W peak measured by ICT and estimated from ISWT was similar to the agreement between measured W peak and W peak estimated from measured VO2 peak by CPET.
- The ISWT is simpler and cheaper than laboratory cycle tests.
Takeaway
Doctors can use a simple walking test to figure out how much exercise a patient with lung problems can handle, just like they would with a more complicated bike test.
Methodology
Patients performed an incremental shuttle walking test, an incremental cycle test, and a semi-steady-state cycle test to measure peak exercise capacity.
Potential Biases
Potential bias due to the non-random order of testing and the lack of a training test.
Limitations
The study design may have influenced results, and the order of tests could introduce bias.
Participant Demographics
93 patients with moderate or severe COPD, predominantly female (67 women, 26 men), aged 64 ± 7 years.
Statistical Information
P-Value
p<0.0001
Confidence Interval
95% CI
Statistical Significance
p<0.0001
Digital Object Identifier (DOI)
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