Niacin has never been one of my favorite medications and this study moved it a little further down, but did not completely drop it off of my list of medication to help lower Triglycerides and raise HDL.
( Sorry , I am having a problem getting the chart to transfer )
I have attached a copy of an old study demonstrating the relationship between LDL cholesterol ,HDL Cholesterol and cardiovascular risk. Look at the LDL of 100 and notice the small increment in cardiovascular risk reduction with 20mg/dl increases in HDL . Now imagine this same slide with and LDL of 70 mg/dl ( actually the LDL deceased from 74 to 62 ) and a 6mg/dl increase in HDL. It would be very difficult to pick up such a small difference in risk .
Also , with a Triglyceride level of 164 mg/dl ( 1.85 mm/l ) your doctor would not have recommended Niacin. I would like to see a sub group analysis of patients with at least a triglyceride level over 200 mg/dl (2.2 MM/l )
Another study is in progress .HPS2-THRIVE , and may answer the question.
Niacin in patients with low HDL cholesterol levels receiving intensive statin therapy.
Have fun , Be Smart and Defeat Heart disease and Diabetes.
David Calder, MD