Studies
Read the study, not just the result.
A useful study record preserves the design and context behind a finding, then links that finding to the precise claim it can—or cannot—support.
Study anatomy
Eight fields keep a finding interpretable.
No single evidence score replaces these distinctions.
Design
Laboratory, animal, observational human, randomized trial, systematic review, or another clearly named method.
Population or model
Who or what was studied, including sample size and relevant characteristics where reported.
Endpoints
What the researchers planned to measure, from biomarkers to function, disease outcomes, healthspan, or lifespan.
Results state
Whether results are unavailable, reported in a preprint, peer reviewed, corrected, or superseded.
Limitations
The design constraints, uncertainty, missing comparisons, short follow-up, or generalizability limits that matter.
Evidence level
What the study type and execution can support for a particular outcome and population—not a universal score.
Sources
Canonical identifiers, publication status, corrections, funding, disclosures, and dates verified.
Linked claims
The specific propositions this study supports, contradicts, informs indirectly, or leaves insufficiently tested.
Separate the judgments
One paper can answer different questions differently.
- Internal validity
- Did the design and analysis support the reported comparison?
- Applicability
- Does the population or model match the people and outcome in the claim?
- Outcome meaning
- Was the endpoint a measurement, function, disease event, healthspan, or lifespan?
- Accumulated evidence
- How does this result fit replication, contradictory findings, and the broader record?
Continue exploring