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Table 3 All gait variables under DT had significantly lower values than under ST (KW < 0.0001). Walking speed and Stride Regularity decreased similarly between clinical subgroups, and allowed the grading of biomechanical severity of subgroups from the least to the most serious as follows: memory impairment, gait instability, recurrent falls, cautious gait

From: Gait disorders in the elderly and dual task gait analysis: a new approach for identifying motor phenotypes

N

Memory Impairment

(n = 19)

Gait Instability (n = 46)

Recurrent Falls

(n =30)

Cautious Gait (n = 8)

p-value (Kruskal-Wallis)

Mean ± SD

Median

Single Task

Dual Task

Single Task

Dual Task

Single Task

Dual Task

Single Task

Dual Task

Single Task

Dual Task

Walking Speed (m/s)

1.2 ± 0.2

1.2

1.0 ± 0.3

1.0

1.0 ± 0.2

1.0

0.9 ± 0.2

0.9

0.9 ± 0.2

0.9

0.8 ± 0.3

0.7

0.7 ± 0.2

0.7

0.6 ± 0.3

0.6

<0.01

<0.01

Stride Frequency (Hz)

0.92 ± 0.07

0.92

0.80 ± 0.14

0.81

0.92 ± 0.09

0.9

0.82 ± 0.09

0.84

0.88 ± 0.09

0.87

0.78 ± 0.12

0.78

0.90 ± 0.08

0.90

0.80 ± 0.11

0.83

0.04*

0.33

Stride Regularity (dimensionless)

258 ± 54

269

195 ± 54

205

214 ± 47

217

170 ± 51

165

199 ± 56

210

159 ± 62

165

147 ± 55

145

115 ± 73

107

<0.01

0.05

  1. For stride frequency and single task, non-parametric KW test is significant (p = 0.04) because mean scores (rank) is lower for recurrent falls and cautious gait (mean rank = 41) than memory impairment and gait instability (mean rank = 58)