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Table 3 Bivariate relationship and multivariate regression data of normal pinch strength dominant (multivariate explained variance: 67.7%) (n = 978)

From: Prediction of grip and key pinch strength in 978 healthy subjects

Covariates

Bivariate

 

Multivariate

   
 

Correlation4

Explained variance5

Partial correlation

Explained variance6

Regression coefficient

Coefficient's significance

Constant

-

-

-

-

-2.637

0.066

Sex1

0.597

35.7%

0.492

24.2%

2.138

<0.001

Age1

-0.389

25.1%

0.187

3.5%

0.079

<0.001

Age2

-0.441

-

-0.237

5.6%

-0.001

<0.001

Height1

0.614

37.7%

0.146

2.1%

0.034

<0.001

Weight1

0.482

23.8%

0.008

<0.1%

0.007

0.796

Weight2

0.470

-

0.024

0.1%

0.001

0.456

Occupation1

0.354

22.9%

0.255

6.5%

2.641

<0.001

Occupation2

0.287

-

-0.230

5.3%

-1.282

<0.001

Occupation3

0.265

-

0.203

4.1%

0.195

<0.001

  1. 1 linear: coefficient times variable, 2 quadratic: coefficient times variable2, 3 cubic: coefficient times variable3, 4 Correlation between pinch strength and the covariates, e.g. pinch strength with age (linear relationship), 5 Explained variance of the optimal bivariate model (maximal explained variance) of pinch strength with the covariates, e.g. pinch strength = a0 + a1age + a2age2. 6 Partial explained variance of the single regression terms within the optimal multivariate model (maximal explained variance).
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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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