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Table 7 Correlations between MRI findings and function

From: MRI of trunk muscles and motor and respiratory function in patients with myotonic dystrophy type 1

MRI measures

Respiratory function

Motor function

  

Muscles

FVC n18

TUG

RMI

6MWT

Sum fat in trunk flexors

−0.487* p = 0.040

0.630** p = 0.003

−0.628**p = 0.003

−0.404p = 0.077

Sum muscle size in trunk flexors

0.551*p = 0.018

−0.259p = 0.270

0.447*p = 0.048

0.377p = 0.102

Sum fat in trunk extensors

−0.220 p = 0.380

0.305 p = 0.191

−0.407 p = 0.075

−0.12 p = 0.960

Sum muscle size in trunk extensors

0.349 p = 0.156

−0.004p = 0.987

0.401p = 0.079

0.124p = 0.604

  1. *Spearman’s rho for fat infiltration, and Pearson’s r for muscle size. Fat infiltration is scored according to the Mercuri-score, muscle size is measured in millimeters for trunk flexors and millimeters2 for trunk extensors