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Table 5 Univariate regression analyses

From: A novel MRI index for paraspinal muscle fatty infiltration: reliability and relation to pain and disability in lumbar spinal stenosis: results from a multicentre study

Clinical parameter

MFI

GCS*

Coefficient (95% CI)

p

AIC

Category

Coefficient (95% CI)

p

AIC

ODI

-6.90 (-17.38, 3.57)

0.195

1940

1

2.65 (-3.91, 9.21)

0.427

1945

    

2

10.28 (-6.40, 26.96)

0.226

NRS leg pain

-1.58 (-3.11, -0.06)

0.042

973

1

0.56 (-0.40, 1.52)

0.249

978

   

2

0.66 (-1.72, 3.04)

0.584

NRS back pain

-0.41 (-2.03, 1.21)

0.618

1011

1

0.86 (-0.15, 1.87)

0.093

1010

   

2

1.48 (-1.02, 3.97)

0.245

ZCQ pain

-0.30 (-0.71, 0.10)

0.136

388

1

0.06 (-0.20, 0.33)

0.629

394

   

2

0.35 (-0.29, 0.99)

0.281

ZCQ disability

-0.25 (-0.63, 0.13)

0.191

368

1

0.08 (-0.16, 0.32)

0.514

370

   

2

0.51 (-0.09, 1.11)

0.098

  1. AIC Akaike information criterion, CI Confidence interval, GCS Goutallier classification system, MFI Muscle fat index, NRS Numeric rating scale, ODI Oswestry disability index, ZCQ Zurich claudication questionnaire
  2. *For the GCS, only categories with fatty infiltration are presented. The coefficient values for the GCS show the estimates for the regression equation of categories 1 and 2, respectively, on category 0 (GCS grade 0, no fatty infiltration)