کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5864221 | 1135777 | 2013 | 8 صفحه PDF | دانلود رایگان |

QuestionsDo patients with chronic obstructive pulmonary disease (COPD) achieve a different distance on the sixminute walk test (6MWT) conducted on a 10Â m course versus on a 30Â m course? When assessing the distance on a 6MWT conducted on a 10Â m course, is it valid to use existing reference equations that were generated on longer courses?DesignA randomised double-crossover experimental study.ParticipantsForty-five patients with COPD in primary physiotherapy care.InterventionAll patients performed a 6MWT twice over a 10Â m course and twice over a 30Â m course. The 6MWTs were performed in accordance with the American Thoracic Society guidelines.Outcome measures6MWD was assessed and predicted distance was calculated based on a range of reference equations.ResultsThe 6MWD on the 10Â m course was 49.5Â m shorter than on the 30Â m course, which was statistically significant (95% CI 39.4 to 59.6). By using existing reference equations for a 6MWT conducted on the 10Â m course, the predicted distance is highly overestimated (with a range of 30% to 33%) and the average distance as a percentage of the predicted value is 8%pred lower compared to a 6MWT conducted on the 30Â m course, resulting in a worse representation of a COPD patient's functional exercise capacity.ConclusionThis study shows that the impact of course length on the 6MWD and on the use of reference equations in patients with COPD is substantial and clinically relevant (based on the most conservative published minimum clinically important difference). Therefore, existing reference equations established for a 6MWT conducted over a 30Â m (or longer) course cannot be applied to predict the distance achieved on the 6MWT on a 10Â m course, which is frequently used in primary care physiotherapy practices for patients with COPD.
Journal: Journal of Physiotherapy - Volume 59, Issue 3, September 2013, Pages 169-176