Link me the study when you find it.
As for the elderly population study
I found two that reached this conclusion and spent allot more work then I needed to researching them given what I am about to write…
Both of them are only looking at numbers and have no mechanistic data, now while the outcome is interesting is very heavily conflicted in both paper, with the first one taking out people who have had heart disease or diabetes before the test, or get diagnosed within 14 days, and found that statin use increased survival either way.
The 2nd one has allot of conflicting interesting in the authors, several have written books criticizing the cholesterol hypothesis and the key author even founded an organisation about criticizing the cholesterol link.
Now as for the outcome it does not prove high ldl is not harmful, merely there is a link with higher ldl levels and survival(below a certain rather high threshold), Assuming the numbers are true in the real world I would sooner guess that it would be due to the problem that some very elderly people have trouble eating, due to issues with appetite, swallowing, chewing ect.
But it turns out my guessing and reading was massively unnecessary on my part as there is a very good article from CEBM.com which I will quote from now(regarding the 2nd study).
“…there are serious methodological flaws with their study, not least the lack of a published protocol, searching of only one database, nonuniform application of inclusion/exclusion criteria, a lack of critical appraisal of the methods used in the included studies, no indication of the quality or uncertainty of the included data and issues with the accuracy of data extraction. A lack of controlling for confounding due to the effect of lipid-lowering treatment and HDL-C levels presents major bias and more likely underpins the majority of the observed inverse associations.”
CEBM review of the 2nd study