Characteristics of the study subjects according to the catechol-o-methyltransferase (<i>COMT</i>) genotypes^*

Abbreviations: BMI = body mass index; HDL = high density lipoprotein; IHD = ischemic heart disease; LDL = low density lipoprotein; tHcy = total homocysteine concentration. *Data are expressed as the mean±SD unless otherwise indicated.