Mental impairment (IQ) N (%) Severe (IQ<30) 10(41.7) Moderate (30<IQ<50) 8 (33.3) Slight (50<IQ<70) Borderline (IQ~70) 4 (16.7) 2 (8.3) Total 24 (100)

Table 4: LGS patients according to Intelligence Quotient.