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Table 1 Participant characteristics of 457 Autistic Children form Autism Genetic Resource Exchange (n = 318 families)

From: Glutathione pathway gene variation and risk of autism spectrum disorders

  Count (%)
Sibships 321 (mean 1.67)
Male 352 (77.62)
Race
 White 419 (91.68)
 Black 1 (0.22)
 Unknown 37 (8.10)
Ethnicity
 Non-Hispanic 380 (83.15)
 Hispanic 40 (8.75)
 Unknown 37 (8.10)
Family type
 Multiplex 446 (98.02)
 Simplex 9 (1.98)
Zygosity
 DZ Twin 33 (7.22)
 Triplet 6 (1.31)