How content is produced
Editorial content is written from the ground up against primary clinical sources: the ADAG study, the American Diabetes Association's published eAG conversion tables and Standards of Care, and the laboratory literature on hemoglobin A1C measurement. Generic claims are cut. Every page states the formula it uses, so nothing is a black box.
The practical implication for a reader: when a page says a 7.0% A1C equals about 154 mg/dL, that figure can be reproduced by hand with the stated formula. Nothing on this site depends on a statistic we cannot trace.
Sourcing standard
Figures are drawn from primary sources first: the ADAG validation study, ADA-published conversion tables, and the diagnostic thresholds in ADA and WHO guidance. Where a secondary source is used, it is checked against the primary one before publication.
- ADAG study group, international multicenter study of estimated average glucose, 2008.
- American Diabetes Association Standards of Care in Diabetes, diagnostic criteria section.
- ADA eAG conversion tables: eAG (mg/dL) = 28.7 × A1C − 46.7.
How corrections work
If a reader finds an error, we want to hear about it. Send the page, the figure you believe is wrong, and the source you are relying on via the contact page. Errors in published copy are corrected promptly, and substantive corrections are logged so the change is public rather than silent.
Because the underlying math (the ADAG formula and standard ranges) has been stable for years, most corrections are about wording rather than numbers. If a clinical guideline changes a range or formula, the site is updated and the change is recorded on the updates page.
Review cadence
The conversion formulas and diagnostic ranges are reviewed annually against current ADA Standards of Care, and on an event basis if a major guideline is revised between reviews. Calculator logic is re-verified on every deploy, not just at annual review. Nothing on this site is monetized through content placement, and the site runs no advertising that could steer editorial choices.