MANCOVA for TCI scores and ABO genotype groups (mean ± SD).

Comparison of the TCI scores among the six genotype groups including age and sex as covariates.The rs 8176719 alleles are exon 6 261G ("G") and 261delG ("D"). The rare genotypes AA × DD, AC × DD, and AA × GD did not occur in our samples.¶There was a significant difference between the ABO blood types and Persistence scores. Post hoc analysis showed that AA genotype group had higher Persistence scores than BO and OO genotype group (p = 0.017 and p = 0.045, respectively; Bonferroni correction).MANCOVA for TCI scores and ABO genotype groups (mean ± SD).