Overview HDL-Atherosclerosis Treatment Study (HATS) Status: Completed Trial end date: 2001-02-01 Target enrollment: Participant gender: Summary To measure the effects of lipid-lowering drugs and/or antioxidant vitamins on progression or regression of coronary heart disease as measured by quantitative angiography in patients with low high density lipoprotein (HDL) cholesterol. Phase: Phase 3 Details Lead Sponsor: University of WashingtonCollaborator: National Heart, Lung, and Blood Institute (NHLBI)Treatments: AntioxidantsNiacinSimvastatin