Is 80% adherence evidence-based? The review says not as a universal rule
Is 80% medication adherence really a universal cutoff? The review says that number came from an early empirical definition in antihypertensive care, where taking at least 80% was treated as sufficient[1].
But the authors do not treat 80% as a proven standard. They say they could not reject or confirm the validity of the historical 80% threshold, and that it was clearly questioned as a general standard[2].
Why the uncertainty? The review says the needed adherence cutoff can depend on the disease, medication, and patient characteristics, because those factors can change what level still produces a satisfactory outcome[3].
The included studies also spanned different chronic diseases and outcomes, including event-free episodes, hospitalization, cortisone use, reported symptoms, and lipid reduction[4].
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