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Table 2 Correlations between ratings on fatigue and depression, muscular impairment, disease duration and CTG repeat size in patients with DM1 (n = 32)

From: Perceived fatigue in myotonic dystrophy type 1: a case-control study

  FIS-T FIS-PS FIS-PHY FI-C
BDI-II .68 ** .68** .65** .64 **
BDI-S .43* .41* .47** .46**
BDI-C .49** .50** .42* .46**
MIRS .37* .40 * .34 .26
Disease duration (years) .11 .14 .13 .10
CTG-repeats † .06 .08 .09 −.11
  1. Note: FIS = Fatigue Impact scale, BDI = Beck Depression Inventory, MIRS = Muscle Impairment Rating Scale. FIS-T = total score, FIS-C = cognitive score, FIS-PS = psychosocial score, FIS-PHY = physical score. BDI-S = BDI somatic dimension, BDI-C = BDI cognitive-affective dimension. * = p < .05, ** = p < .001, † = n = 29