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Table 4 Regression models for physical activity

From: Clinical mobility metrics estimate and characterize physical activity following lower-limb amputation

 

Model 1

(PEQ-MS)

Model 2

(L-test)

B

Sig

B

Sig

Intercept

5196.9

0.019

7887.7

 ≤ 0.001

Age

 − 55.0

0.102

 − 10.1

0.720

TSAmp

32.0

0.115

16.3

0.356

Level

 − 674.7

0.347

404.7

0.096

Mobility metric

65.5

0.039

 − 117.9

 ≤ 0.001

R2

27.1%*

47.6%*

R2 Change

  

 Block I

15.2%

15.2%

 Block II

0.6%

0.6%

 Block III

11.3%*

31.8%*

 

Model 3

(10mWT SSWS)

Model 4

(6MWT)

B

Sig

B

Sig

Intercept

 − 1472.9

0.518

 − 152.0

0.948

Age

3.1

0.910

5.8

0.847

TSAmp

14.8

0.370

31.9

0.062

Level

753.7

0.213

151.6

0.802

Mobility metric

5499.0

 ≤ 0.001

10.2

 ≤ 0.001

R2

53.4%*

46.5%*

R2 Change

  

 Block I

15.2%

15.2%

 Block II

0.6%

0.6%

 Block III

37.6%*

30.7%*

  1. R2 refers to the total variance explained by the model
  2. R2 change shows the variance explained by each block
  3. Block I: Age and TSAmp; Block II: Block I + Amputation level (0 = Transtibial, 1 = Transfemoral); Block III (Model 1): Block II + PEQ-MS scores; Block III (Model 2): Block II + L-Test time; Block III (Model 3): Block II + 10mWT SSWS; Block III (Model 4): Block II + 6MWT distance
  4. *p < 0.050 for final block
  5. PEQ-MS Prosthesis Evaluation Questionnaire-Mobility Subscale, 10mWT SSWS 10-m Walk Test self-selected walking speed, 6MWT 6-min Walk Test, B unstandardized beta coefficient, TSAmp time since amputation, Level amputation level