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Table 3 Regression analysis of the relationship between the postoperative paraspinal muscle volume loss and age

From: Paraspinal muscle changes after single-level posterior lumbar fusion: volumetric analyses and literature review

Age vs

MRI (n = 24)

p-value

CT (n = 16)

p-value

β coefficient

Adjusted R2

β coefficient

Adjusted R2

Changes of MF (cm3)

 Right

−0.592

0.321

0.002a

−0.076

− 0.065

0.780

 Left

− 0.489

0.204

0.015a

0.114

−0.057

0.674

Changes of ES (cm3)

 Right

0.203

−0.002

0.342

−0.590

0.301

0.016a

 Left

0.267

0.029

0.207

−0.281

0.013

0.292

Changes of Psoas (cm3)

 Right

0.184

−0.010

0.388

0.019

−0.071

0.945

 Left

0.155

−0.020

0.469

0.189

−0.033

0.482

  1. MRI magnetic resonance imaging, CT computed tomography, SD standard deviation, MF multifidus, ES erector spinae
  2. aStatistically significant difference was defined as p < 0.05