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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)