Autistic children with increased blood mercury levels (n=48) Autistic children with normal blood mercury levels (n=52) X2 (p) Positive anti-MBP antibodies (n=72) 44 (91.6%) 28 (53.8%) 15.88 Negativeanti-MBP antibodies (n=28) 4 (8.4%) 24 (46.2%) (<0.001)

Table 2: The frequency of autistic patients with increased blood mercury levels in relation to the positivity of serum anti-MBP autoantibodies.