Autistic patients (n=100) Healthy co ntrols (n=100) P-value
  Mean ± SD Range Mean ± SD Range  
Blood Mercury Levels (μg/dl) 18.7 ± 6.2 3.2-32.4 4.3 ± 1.4 1.2-6.5 0.001
Table 1: Levels of blood mercury in autistic patients and healthy children.