Comparisons of DAT and DRD2 mRNA levels between the three groups (Mean±SD).

In the homogeneity test of variance, the Levene value of DAT mRNA levels in the three groups was 0.37 (p = 0.692), and the One-way ANOVA and LSD methods were chosen; the Levene value of DRD2 mRNA levels in the three groups was 4.89 (p = 0.011), and the Welch approximate analysis of variance and Tamhane methods were chosen.*Comparisons between the three groups, p = 0.017, ▴Comparison between the chronic schizophrenia patients and healthy controls, MS interclass = 0.198, p = 0.005,