Statins are known to reduce the risk of further problems in patients of any age who have already suffered heart problems or stroke. However, until now it has not been clear how effective their use is in preventing such events occurring in healthy people aged 75 and over, with no previous history of cardiovascular disease.
source https://www.lifetechnology.com/blogs/life-technology-news-blog/increased-risk-of-cardiovascular-disease-for-healthy-75-year-olds-who-stop-taking-statins