One of my favorite groups: TheNNT (Number needed to treat) offers this analysis (none of these physicians/epidemiologists/statisticians are associated with the pharmaceutical industry)
Statin Drugs Given for 5 Years for Heart Disease Prevention (Without Known Heart Disease)
In Summary, for those who took the statin for 5 years:
Benefits in NNT
None were helped (life saved)
1 in 104 were helped (preventing heart attack)
1 in 154 were helped (preventing stroke)
Harms in NNH
1 in 50 were harmed (develop diabetes*)
1 in 10 were harmed (muscle damage)
http://www.thennt.com/nnt/statins-fo...heart-disease/