How to read the evidence ladder
Every claim in this publication is graded by what kind of evidence it rests on -- never a numeric score, always one of these.
| ◆◇◇◇◇ | LabA mechanism is possible. |
| ◆◆◇◇◇ | AnimalsMice are not humans. |
| ◆◆◆◇◇ | People, watchedA pattern, not a cause. |
| ◆◆◆◆◇ | People, tested on a stand-inA marker moved. Whether life changed is still open. |
| ◆◆◆◆◆ | People, tested on what mattersFalls, illness, independence, death. |
Three things that sit beside the ladder
Not every citable thing is a study of a treatment. These never get a diamond count -- showing one would claim a step on the ladder they were never meant to occupy.
Measurement. Is the test itself reliable? Not a claim about a treatment.
Review. The text says what it pooled; it inherits the stage of what it pools.
Not a study. News, a registration, a funding round, a commentary -- no study design at all.
Scientist working at the intersection of computation, biology and medicine. Longevity, Interpreted. exists to understand the evidence, not sell an intervention.
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