Table 4 Multiple regression analysis (PhA vs physical activity and physical function).

From: Phase angle is related to physical function and quality of life in preoperative patients with lumbar spinal stenosis

 

Outcome

Model

Estimated value

95%CI

P-value

standardized β

VIF

Physical activity

LSA

1

0.007

0.003–0.010

 < 0.0001*

0.317

1.203

2

0.002

0.004–0.011

 < 0.0001*

0.345

1.221

Physical function

Handgrip strength

1

0.035

0.022–0.049

 < 0.0001*

0.522

2.382

2

0.034

0.020–0.048

 < 0.0001*

0.509

2.439

Walking speed

1

0.529

0.304–0.755

 < 0.0001*

0.312

1.073

2

0.559

0.340–0.779

 < 0.0001*

0.334

1.081

TUG

1

− 0.024

− 0.036 to − 0.012

0.0002*

− 0.269

1.093

2

− 0.022

− 0.034 to − 0.010

0.0003*

− 0.258

1.102

  1. PhA, phase angle; CI, confidence interval; VIF, Variance Inflation Factor; LSA, Life Space Assessment; TUG, Timed Up and Go test; BMI, body mass index; PNI, Prognostic Nutritional Index.
  2. Model 1: Adjusted for age, sex, and BMI.
  3. Model 2: Adjusted for age, sex, BMI, and PNI.
  4. P-value < 0.05*.
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