America's Future · 80th Anniversary

Evidence Engine

Grade the strength of evidence behind a claim across the whole body of studies — transparently — and see exactly what would raise the grade. See the weights.

The claim

B-70.3 / 100

Body weight: 1.69Support: 84%Consistency: 86%

What would raise the grade

Add a large RCT (≈+13.9 pts → B+).

The body of evidence (4)

RCTn=120Supports the claimweight 0.816
12-week double-blind RCT vs. placebo (WOMAC pain down).
Cohortn=300Supports the claimweight 0.537
Prospective cohort, self-reported stiffness improved.
Observationaln=80Mixed / partialweight 0.273
Cross-sectional survey, effect not significant after adjustment.
In-vitron=1Supports the claimweight 0.060
Chondrocyte assay, reduced inflammatory markers (NF-kB).

Add a study

Weight ledger (every weight, in the open)

evidence.ledger

RCT n=120 supports                 w=0.816  +0.816
Cohort n=300 supports              w=0.537  +0.537
Observational n=80 mixed           w=0.273  ·0.000
In-vitro n=1 supports              w=0.060  +0.060
----------------------------------------
total weight = 1.686
support = 84%   consistency = 86%   strength = 81%
GRADE = B-  (70.3 / 100)