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Table 4 Regression analysis of the relationship between the postoperative paraspinal muscle volume loss and BMI

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

BMI vs

MRI (n = 24)

p-value

CT (n = 16)

p-value

β coefficient

Adjusted R2

β coefficient

Adjusted R2

Changes of MF (cm3)

 Right

−0.371

0.098

0.075

−0.004

−0.071

0.987

 Left

−0.214

0.002

0.315

0.293

0.021

0.271

Changes of ES (cm3)

 Right

0.184

−0.010

0.391

−0.128

− 0.054

0.636

 Left

0.009

−0.045

0.965

−0.329

0.044

0.214

Changes of Psoas (cm3)

 Right

−0.057

−0.042

0.793

−0.083

− 0.064

0.759

 Left

0.107

−0.034

0.619

0.178

−0.038

0.511

  1. BMI body mass index, MRI magnetic resonance imaging, CT computed tomography, SD standard deviation, MF multifidus, ES erector spinae
  2. * Statistically significant difference was defined as p < 0.05