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Table 3 Comparisons of mean scaled scores for the seven-subtest WAIS-R in classic adult-onset and mild DM1 patients

From: Comparisons of intellectual capacities between mild and classic adult-onset phenotypes of myotonic dystrophy type 1 (DM1)

Scale Subtest Total Classic adult-onset Mild P value
Verbal Information 6.5 ± 1.8 (187) 6.3 ± 1.8 (151) 7.0 ± 2.1 (36) n.s.
  Digit Span 6.0 ± 2.4 (188) 5.7 ± 2.4 (151) 6.8 ± 2.3 (37) 0.045
  Arithmetic 7.5 ± 2.4 (179) 7.2 ± 2.3 (144) 8.6 ± 2.3 (35) 0.004
  Similarities 7.0 ± 2.2 (168) 6.9 ± 2.2 (135) 7.1 ± 2.1 (33) n.s.
Performance Picture Completion 6.7 ± 2.2 (188) 6.6 ± 2.1 (151) 7.1 ± 2.5 (37) n.s.
  Block Design 6.3 ± 2.2 (186) 6.0 ± 2.0 (150) 7.5 ± 2.6 (36) <0.001
  Digit Symbol 6.6 ± 2.1 (187) 6.5 ± 2.0 (150) 6.9 ± 2.5 (37) n.s.
  1. Mean Scaled Scores ± SD (n).
  2. WAIS-R = Wechsler Adult Intelligence Scales-Revised; DM1 = Myotonic Dystrophy type 1.