BACKGROUND:Subclinical hypothyroidism (SCH) is defined as an elevated serum thyroidstimulating hormone (TSH) level with a normal serum free tri-iodothyronine (FT3) & free thyroxine (FT4) concentration. Hypothyroidism is associated with an increased risk of atherosclerosis. SCH can progress to overt hypothyroidism. Carotid intima-media thickness (CIMT) is a close marker of early atherosclerotic changes and is a widely accepted surrogate end point for cardiovascular events