key: cord-0254611-5ga0dux9
authors: Nusdwinuringtyas, Nury; Fransiska, Tresia; Sunarjo, Peggy; Triangto, Kevin; Dahlan, Sopiyudin
title: Agreement Test Between The Six Minutes Walking Test And Four Meter Gait Speed
date: 2020-11-20
journal: bioRxiv
DOI: 10.1101/2020.11.20.391193
sha: 703ce272fb959c7fb700431e2c952d905361a370
doc_id: 254611
cord_uid: 5ga0dux9

Background/Objective In the field of Physical Medicine and Rehabilitation, it is essential to measure individual functional capacity, which could be evaluated through walking tests. Aside from the commonly used six minutes walking test (6MWT), four meter gait speed (4MGS) are widely used for its practicality. This study aimed to assess the agreement between 4 MGS and the 6MWT in Indonesian healthy adults. Methods This agreement analysis study had recruited 61 healthy and sedentary Indonesians aged 18 until 50 years old, and they were instructed to perform three tests, namely 6MWT and 4MGS with six meters and eight meters track. These gait speed were then compared to assess validity. Results Mean gait speed results for males in 6MWT is 1.602 m/s, whereas 4MGS in six meter track is 2.114 m/s and similarly 2.108 m/s in the eight meter track. Females on the other hand, achieved 1.462 m/s for 6MWT, 1.908 m/s and 1.986 m/s for 4MGS in six and eight meter simultaneously. Bland Altman Agreement test between the 6MWT and 4MGS shows scatter dots with close limit of agreement, thus showing a good agreement between the 6MWT and 4 MGS with both tracks. Discussion Both track length of 4 MGS were in a good agreement with 6MWT for functional capacity assessment. Conclusions In response to the COVID-19 pandemic era, shorter track of 4MGS (six meters) can be feasibly utilized. It is evident that shorter duration and track will boost the tests practicality in assessing functional capacity for both inpatient and outpatient settings.

The six minute walk test (6MWT) is a functional capacity test which is widely used, as 23 walking depicts a general activity in daily living. 1, 2 This test is also classified as a 24 Za = 2.58 (confidence of 99%) and standard deviation (s) of 0.2 m/s (based on a study 1 by Bohannon that comfortable gait speed for both genders age 20-50 years old ranges 2 between 0.094 -0.229 m/s, thus obtaining the highest value rounded up to 0.2 m/s); and 3 absolute accuracy expected (d) of 0.1 m/s. Acknowledging the cross sectional nature of 4 this study, no drop out was considered. This calculation then yielded a sample size of n 5 = {2.58 x 0.2/(0.1)} 2 = 26.6 = 27 (rounded up). 6 7 This study then attempted to present each gender separately, but the gender 8 classification will not be compared for agreement. Therefore based on the sample size 9 calculation, this study gathered double of the initial calculation accounting for each 10 genders, summed up into 60 subjects. Sample size calculation for both genders are 11 considered the same due to identical standard deviation (s) and absolute accuracy (d) 12

values. Gait speed obtained from 4MGS were seen to be in agreement with the speed of 6MWT 1 performance. Additionally the 4MGS has a shorter test duration and requires a much 2 shorter track as compared to 6MWT. Both of these qualities are valuable during the 3 pandemic era, as the 4MGS would be highly applicable in the telemedicine setting. This 4 study had also shown that both 4MGS track, namely the six and eight meter, have 5 achieved good agreement to the 6MWT. 

Gait speed as a measure of functional status in COPD patients

Four-meter Gait Speed: Normative Values and