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

Table 2 WAIS-R IQs of patients with DM1

WAIS-R IQs	Total	Classic adult-onset	Mild	P value
WAIS-R IQs	n =188 (159 ^a)	n =151 (129 ^a)	n =37 (30 ^a)	P value
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

Mean ± SD.
WAIS-R = Wechsler Adult Intelligence Scale-Revised; IQ = Intelligence Quotient;
DM1 = Myotonic Dystrophy type 1; FSIQ = Full-Scale IQ; VIQ = Verbal IQ; PIQ = Performance IQ.
^aValid N for VIQ and PIQ indices.

ISSN: 1750-1172