Table 1

Correlation found between muscle MRI scores and the appropriate muscle function test per every region of the body

Body regionFunctional scoreSpearman testCorrelation coefficient
Cranial musclesNSAA item 1 (lift head)0.0001−0.46
Arm musclesBrooke score0.00010.77
MMT biceps*0.0001−0.68
Scapular musclesBrooke scale0.00010.68
ACTIVLIM scale0.0001−0.57
Trunk/pelvic musclesNSAA item 12–13 (stand on one leg)0.0001−0.74
NSAA item 6 (get to sitting)0.0001−0.72
MMT glutei†0.0001−0.471
Thigh musclesTime to Climb 4 Steps0.00010.63
Time to Up & Go0.00010.63
ACTIVLIM Up Stairs0.00010.53
ACTIVLIM Down Stairs0.00010.68
MMT knee flexion‡0.0001−0.63
Leg musclesNSAA item 20 (stand on heels)>0.05
NSAA item 28 (stand on tiptoes)>0.05
MMT plantar flexion§>0.05
Trunk, pelvis, thigh muscles6MWT0.0001−0.73
Time to run/walk 10 m0.00010.55

  • *Correlation between the degree of muscle fatty transformation of the biceps brachii and the MMT of biceps.

  • †Correlation between mean degree muscle fatty transformation of the glutei muscles and MMT of hip extension.

  • ‡Correlation between the mean degree of muscle fatty transformation of the posterior muscles of the thighs and MMT of knee flexion.

  • §Correlation between the mean degree of muscle fatty transformation of the posterior muscles of the lower legs and MMT of plantar flexion.

  • MMT, manual muscle test; MWT, minute walking test; NSAA, North Star Ambulatory Assessment.