Are the average gait speeds during the 10 meter and 6 minute walk tests redundant in Parkinson disease?
Duncan, Ryan P.
Combs-Miller, Stephanie A.
McNeely, Marie E.
Leddy, Abigail L.
Cavanaugh, James T.
Dibble, Leland E.
Ellis, Terry D.
Ford, Matthew P.
Foreman, K. Bo
Earhart, Gammon M.
MetadataShow full item record
Citation (published version)Ryan P Duncan, Stephanie A Combs-Miller, Marie E McNeely, Abigail L Leddy, James T Cavanaugh, Leland E Dibble, Terry D Ellis, Matthew P Ford, K Bo Foreman, Gammon M Earhart. 2017. "Are the average gait speeds during the 10 meter and 6 minute walk tests redundant in Parkinson disease?." Gait & Posture, Volume 52, pp. 178 - 182 (5). https://doi.org/10.1016/j.gaitpost.2016.11.033
We investigated the relationships between average gait speed collected with the 10Meter Walk Test (Comfortable and Fast) and 6Minute Walk Test (6MWT) in 346 people with Parkinson disease (PD) and how the relationships change with increasing disease severity. Pearson correlation and linear regression analyses determined relationships between 10Meter Walk Test and 6MWT gait speed values for the entire sample and for sub-samples stratified by Hoehn & Yahr (H&Y) stage I (n=53), II (n=141), III (n=135) and IV (n=17). We hypothesized that redundant tests would be highly and significantly correlated (i.e. r>0.70, p<0.05) and would have a linear regression model slope of 1 and intercept of 0. For the entire sample, 6MWT gait speed was significantly (p<0.001) related to the Comfortable 10 Meter Walk Test (r=0.75) and Fast 10Meter Walk Test (r=0.79) gait speed, with 56% and 62% of the variance in 6MWT gait speed explained, respectively. The regression model of 6MWT gait speed predicted by Comfortable 10 Meter Walk gait speed produced slope and intercept values near 1 and 0, respectively, especially for participants in H&Y stages II-IV. In contrast, slope and intercept values were further from 1 and 0, respectively, for the Fast 10Meter Walk Test. Comfortable 10 Meter Walk Test and 6MWT gait speeds appeared to be redundant in people with moderate to severe PD, suggesting the Comfortable 10 Meter Walk Test can be used to estimate 6MWT distance in this population.
Published in final edited form as: Gait Posture. 2017 February ; 52: 178–182. doi:10.1016/j.gaitpost.2016.11.033.
Showing items related by title, author, creator and subject.
Contribution of leaf specular reflection to canopy reflectance under black soil case using stochastic radiative transfer model Yang, Bin; Knyazikhin, Yuri; Zhao, Haimeng; Ma, Yuzhong (Elsevier Science BV, 2018-12-15)Numerous canopy radiative transfer models have been proposed based on the assumption of “ideal bi-Lambertian leaves” with the aim of simplifying the interactions between photons and vegetation canopies. This assumption may ...
Petroff, A.; Murphy, J.G.; Thomas, S.C.; Geddes, Jeffrey A. (PERGAMON-ELSEVIER SCIENCE LTD, 2018-10-01)Aerosol fluxes were measured by eddy-correlation for 8 weeks of the summer and fall of 2011 above a temperate broadleaf forest in central Ontario, Canada. These size-resolved measurements apply to particles with optical ...
Integrating archaeology and ancient DNA analysis to address invasive species colonization in the Gulf of Alaska West, Catherine; Hofman, Courtney A.; Ebbert, Steve; Martin, John; Shirazi, Sabrina; Dunning, Samantha; Maldonado, Jesus E. (WILEY, 2017-10-01)The intentional and unintentional movement of plants and animals by humans has transformed ecosystems and landscapes globally. Assessing when and how a species was introduced are central to managing these transformed ...