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Table 6 Multivariate 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 -3.74 (-14.69, 7.21) 0.502 1863 1 0.10 (-5.69, 7.69) 0.769 1869
     2 7.06 (-0.26, 23.38) 0.395
NRS leg pain -0.59 (-2.13, 0.96) 0.455 913 1 0.21 (-0.70, 1.12) 0.649 916
    2 -0.23 (-244, 1.98) 0.837
NRS back pain 0.80 (-0.84, 2.44) 0.339 950 1 0.63 (-0.34, 1.60) 0.199 952
    2 0.75 (-1.61, 3.10) 0.533
ZCQ pain -0.22 (-0.64, 0.20) 0.205 364 1 -0.01 (-0.26, 0.26) 0.996 371
    2 0.24 (-0.39, 0.86) 0.454
ZCQ disability -0.01 (-0.30, 0.03) 0.979 344 1 0.01 (-0.24, 0.25) 0.972 347
    2 0.40 (-0.19, 0.99) 0.186
  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)