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Table 2 WAIS-R IQs of patients with DM1

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

WAIS-R IQs Total Classic adult-onset Mild P value
n =188 (159 a) n =151 (129 a) n =37 (30 a)
FSIQ 82.6 ± 8.4 81.1 ± 7.5 88.7 ± 9.2 <0.001
VIQ 83.4 ± 9.1 82.3 ± 9.0 87.8 ± 8.5 0.001
PIQ 85.7 ± 10.2 83.6 ± 8.2 94.8 ± 12.8 <0.001
VIQ-PIQ discrepancies 7.9 ± 6.3 7.2 ± 6.0 10.8 ± 6.7 0.002
  1. Mean ± SD.
  2. WAIS-R = Wechsler Adult Intelligence Scale-Revised; IQ = Intelligence Quotient;
  3. DM1 = Myotonic Dystrophy type 1; FSIQ = Full-Scale IQ; VIQ = Verbal IQ; PIQ = Performance IQ.
  4. aValid N for VIQ and PIQ indices.