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Table 6 Correlations between MRI findings and MMT 0–3 in the DM1 patient group

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

MRI findings

Muscle strength

Muscles

Trunk Extension

Trunk Flexion

Sum fat in trunk flexors

rho-0.523*, p = 0.018

rho-0.291, p = 0.214

Sum muscle size in trunk flexors

r = 0.219, p = 0.353

r = 0.474*, p = 0.035

Sum fat in trunk extensors

rho-0.427, p = 0.060

rho-0.177, p = 0.445

Sum muscle size in trunk extensors

r = 0.140, p = 0.556

r = 0.319, p = 0.171

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