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Table 2 Description of the coefficients and model fit of the gait-speed-only model and the definitive model

From: Beyond gait speed: exploring the added value of Inertial Measurement Unit-based measurements of gait in the estimation of the walking ability in daily life

  

Gait-speed-only model

Final model

Fixed

Coeff

SE

CI [95%]

Coeff

SE

CI [95%]

Average gait speed [m/s]

Gait speed 2MWT [m/s]

0.067

0.031

[0.006,0.128]

-0.021

0.117

[-0.250,0.207]

Intensity (PC6)

-

-

-

0.106

0.042

[0.025,0.188]

 

NRMSE

AIC

BIC

NRMSE

AIC

BIC

 

0.507

291

302

0.501

287

301

Fixed

Coeff

SE

CI [95%]

Coeff

SE

CI [95%]

Max gait speed [m/s]

Gait speed 2MWT [m/s]

0.280

0.05

[0.189,0.379]

0.175

0.068

[0.040,0.306]

Intensity (PC6)

-

-

-

0.088

0.071

[-0.05,0.227]

Gait speed 2MWT *PC6

   

0.034

0.015

[0.004,0.064]

 

NRMSE

AIC

BIC

NRMSE

AIC

BIC

 

0.641

449

461

0.640

445

463

Fixed

Coeff

SE

CI [95%]

Coeff

SE

CI [95%]

Number of steps

Gait speed 2MWT [m/s]

288

48

[193,383]

281

67

[150,412]

Intensity (PC6)

-

-

-

-40

65

[-167,-87]

Gait speed 2MWT *PC6

   

30

14

[4,57]

 

nRMSE

AIC

BIC

nRMSE

AIC

BIC

 

0.347

2253

2264

0.343

2251

2269

  1. Abbreviations: Coeff Coefficient, SE Standard error, CI Confidence interval, nRMSE normalised root mean square error, AIC Akaike information criterion, BIC Bayesian information criterion, m meter, s seconds
  2. The definitive model included gait speed and all PCs that were significant confounders or effect modifiers
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BMC Neurology

ISSN: 1471-2377

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