Skip to main content

Table 2 Parameters used to power the study

From: Evaluation of the Keeogo exoskeleton for assisting ambulatory activities in people with multiple sclerosis: an open-label, randomized, cross-over trial

Measurement

 

TFT

PAL

Parameters

 

6 MWT (m)

TST (s)

TUG (s)

Step/day

Within-subject SD, σ

 

30.1

1.62

1.59

698

Superiority margin, MDC

 

65.4

3.47

3.50

1582

Hypothesize change, Δ

 

87.4

5.47

4.80

2082

Effect, δ  =  Δ-MDC

 

22.0

2.00

1.30

500

 Required sample

N

25

10

26

26

  1. MDC Minimal detectable change, TFT Timed functional test
  2. TUG Timed up and go test, 6 MWT 6 min walk test, TST timed stair test
  3. PAL Physical activity level measured with Actigraph monitor