Distribution of cardiovascular risk factors by quartiles of PON1 activity.

Values are mean (±SD) or number (percentage). Data for C-reactive protein, meyloperoxidase and triglycerides are presented as median (±interquartile range). P = p-value for linearity between quartiles of PON1-activity and risk factor levels; R = Pearson's (parametric variables) or Spearman correlation (non-parametric variables e.g. C-reactive protein, meyloperoxidase and triglycerides) between PON1-activity and risk factors, and the corresponding p-value (P†). LDL = low-density lipoprotein, HDL = high-density lipoprotein. * indicates p-value by chi square test for dichotomous variables.