Table 2 Spearman's rank correlation analysis (PhA vs. measurement items).

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

Variable

vs Variable

ρ

P-value

Phase angle

Age

− 0.387

 < 0.0001*

BMI

0.177

0.0419*

PNI

0.197

0.0241*

Handgrip strength

0.575

 < 0.0001*

Walking speed

0.455

 < 0.0001*

TUG

− 0.470

 < 0.0001*

LSA

0.479

 < 0.0001*

JOABPEQ (low back pain)

− 0.003

0.9730

JOABPEQ (lumbar function)

0.258

0.0027*

JOABPEQ (walking ability)

0.195

0.0243*

JOABPEQ (social life function)

0.213

0.0136*

JOABPEQ (mental health)

0.270

0.0016*

EQ-5D

0.206

0.0197*

VAS (low back pain)

− 0.030

0.7371

VAS (lower limb pain)

− 0.168

0.0567†

VAS (lower limb numbness)

0.054

0.5420

  1. PhA, phase angle; BMI, body mass index; PNI, Prognostic Nutritional Index; TUG, Timed Up and Go test; LSA, Life Space Assessment; JOABPEQ, Japanese Orthopaedic Association Back Pain Evaluation Questionnaire; EQ-5D, EuroQOL 5 dimensions 3-level; VAS, Visual Analog Scale.
  2. P-value < 0.1†, P-value < 0.05*.
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