A systematic review of over 30 randomized controlled trials found no clear relationship between the degree of LDL reduction from cholesterol-lowering drugs and prevention of cardiovascular events.
"So myself and two cardiologists did a systematic review of the totality of drug industry-sponsored trials, by the way, and some diet trials, but many drug industry-sponsored trials, all of the randomized controlled trials on cholesterol-lowering drugs: statins, PCSK9, blah, blah. Was there a clear relationship as you lowered LDL in low-risk and high-risk patients, Mark, okay, over 30 studies, was there a relationship with lowering LDL and preventing cardiovascular events? No." (said at 0:48:30)
The speaker accurately describes the findings of a published systematic review of 35 randomized controlled trials (PMID 32747335), which he co-authored. The review analyzed trials evaluating LDL cholesterol targets across diverse risk populations and concluded that achieving specific LDL target levels through drug therapy did not confer consistent cardiovascular benefit, questioning the direct relationship between LDL-C lowering as a surrogate target and cardiovascular event reduction. A subsequent 2022 systematic review and meta-regression in JAMA Internal Medicine (PMID 35285850) evaluating statin trials similarly concluded that a conclusive relationship between the magnitude of absolute LDL-C reduction and individual clinical outcomes (all-cause mortality, myocardial infarction, stroke) was not established.
- supports: Hit or miss: the new cholesterol targets. (BMJ evidence-based medicine 2021)
"Achieving these cholesterol target levels did not confer any additional benefit in a systematic review of 35 randomised controlled trials." (abstract, results, passage verified)
pubmedfull study (doi) - supports: Evaluating the Association Between Low-Density Lipoprotein Cholesterol Reduction and Relat… (JAMA internal medicine 2022)
"A conclusive association between absolute reductions in LDL-C levels and individual clinical outcomes was not established, and these findings underscore the importance of discussing absolute risk reductions when making informed clinical decisions with individual patients." (abstract, conclusions, passage verified)
pubmedfull study (doi)