Inverse relationship between zinc and molybdenum concentration in autistic children. The inverse relationship between hair logarithmic zinc and molybdenum concentration in autistic children (N = 2550) is shown. Each point represents the corresponding logarithmic zinc and molybdenum concentration of the individual child. A highly significant inverse relationship between zinc and molybdenum concentrations (r = −0.509, P < 0.00001) in the autistic children is shown.