In addition, I imagine confounds which are patient/location specific can be calibrated out to some extent, by comparing against finger-stick while fasting, and

In addition, I imagine confounds which are patient/location specific can be calibrated out to some extent, by comparing against finger-stick while fasting, and longer-term A1C. Following a chain of references from the OP: study of wearable: https://cb195ec0-5419-4138-91fc-7288f69116ec.filesusr.com/ugd/23f159_f935920175134c9d8c85c34ebbd21693.pdf https://cb195ec0-5419-4138-91fc-7288f69116ec.filesusr.com/ug... whitepaper announcement: https://medium.com/know-labs/know-labs-releases-white-paper-detailing-experimental-results-of-their-bio-rfid-technology-a7c6ced6dc84 https://medium.com/know-labs/know-labs-releases-white-paper-... whitepaper: https://docs.google.com/document/d/e/2PACX-1vQXqlmKwPzhZIn9tFi3tFHHYFla9ciX8ljZL638JH9AUKjX7-DGKB1Qk4cProTbOp27ZLAhriFfOAVT/pub https://docs.google.com/document/d/e/2PACX-1vQXqlmKwPzhZIn9t... The whitepaper gives actual prep methods for tissue phantoms. It shows a clean correlation of ca 1.72GHz transmission to glucose. Presumably altered parameters in tissue phantoms could help roughly characterize confounds.