There appears to be no peer-reviewed clinical validation information available on the technology used in the Boots 56-90-439 to measure blood pressure.
|Medaval||Not recommended||This device has not been clinically validated.|
|Which? (UK)||Previous: 2013||A|
Ware A, Stevens R, Selwood M, Fleming S. Accuracy of blood pressure monitors available in high street pharmacies. Blood Press Monit. 2016 Feb;21(1):59-61. doi: 10.1097/MBP.0000000000000151. PMID: 26427055.
Measurements from the Boots 5690439 are compared to those from the Omron BPM tester PA-350, though not in a formal validation.