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Table 4 Distributions of WAIS-R diagnostic labels according to WAIS-R FSIQ measurement and SPM FSIQ’ estimation in DM1 patients

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

  WAIS-R FSIQ SPM FSIQ’  
( n =188) ( n =187)  
WAIS-R diagnostic labels Frequency Valid percent Mean ± SD Frequency Valid percent Mean ± SD p Value a
Very superior (130 and above) _ _ _ _ _ _ _
Superior (120–129) _ _ _ _ _ _ _
High average (110–119) 1 0.5 119.0 _ _ _ _
Average (90–109) 33 17.6 94.6 ± 3.7 31 16.6 93.1 ± 3.0 0.008
Low average (80–89) 87 46.3 84.0 ± 2.7 72 38.5 84.5 ± 3.3 n.s.
Borderline (70–79) 58 30.9 75.3 ± 3.0 74 39.6 75.5 ± 2.8 n.s.
Deficiency (69 and below) 9 4.8 67.0 ± 2.8 10 5.3 66.9 ± 2.7 n.s.
  1. WAIS-R = Wechsler Adult Intelligence Scales-Revised; FSIQ = Full-Scale IQ; SPM = Standard Progressive Matrices.
  2. aDifferences between mean WAIS-R FSIQ and mean SPM FSIQ’ for each WAIS-R diagnostic labels were calculated using a one-sample t-test where the known value was the corresponding mean WAIS-R FSIQ.