Relation between age and unadjusted composite z-score for systemic (A) and vascular (B) inflammation in Caucasians and African Americans. Relation between age and adjusted (gender, BMI, HOMA-IR, HDL-C, LDL-C and smoking) composite z-score for systemic (C) and vascular (D) inflammation in Caucasians and African Americans. Straight line represents Caucasians, dotted line represents African Americans.