Table 5 Multiple regression analysis (PhA vs QOL).

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

Disease-specific QOL

JOABPEQ (low back pain)

1

− 0.000

− 0.003 to 0002

0.7721

− 0.021

1.004

2

− 0.000

− 0.003 to 0.002

0.8184

− 0.016

1.011

JOABPEQ (lumbar function)

1

0.004

0.001 to 0.007

0.0078*

0.196

1.111

2

0.004

0.001 to 0.007

0.0090*

0.194

1.112

JOABPEQ (walking ability)

1

0.004

0.001 to 0.008

0.0153*

0.171

1.016

2

0.005

0.002 to 0.009

0.0055*

0.197

1.027

JOABPEQ (social life function)

1

0.003

− 0.001 to 0.008

0.1740

0.100

1.097

2

0.004

− 0.001 to 0.009

0.0787†

0.132

1.122

JOABPEQ (mental health)

1

0.006

0.001 to 0.011

0.0193*

0.166

1.021

2

0.007

0.001–0.012

0.0135*

0.176

1.027

Comprehensive QOL

EQ-5D

1

0.357

− 0.392 to 1.105

0.3474

0.068

1.064

2

0.458

− 0.297 to 1.212

0.2319

0.088

1.076

  1. PhA, phase angle; QOL, quality of life; CI, confidence interval; VIF, Variance Inflation Factor; JOABPEQ, Japanese Orthopaedic Association Back Pain Evaluation Questionnaire; EQ-5D, EuroQOL 5 dimensions 3-level; 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 < 0.1†, P-value < 0.05*.
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