Table 1 Family-based studies of the role of the COMT Val158Met polymorphism in schizophrenia

From: Lack of association of catechol-O-methyltransferase gene Val108/158Met polymorphism with schizophrenia: a family-based association study in a Chinese population

Study Trio Number of alleles transmitted Number of alleles not transmitted
   Val Met Val Met
Current study 220 93 103 103 93
Li et al5 178 80 51 51 80
Fan et al6 166 64 70 70 64
Total 564 237 224 224 237