According to the results, the Galaxy Watch 4 complies with the FDA and ISO standards, and the researchers wrote in the paper that “The GW4 had an overall RMSE (root mean squared error) of 2.3% and negligible bias of -0.2%. A Bland-Altman density plot showed good agreement between the GW4 and the reference pulse oximeter.”
In layman’s terms, the measurements taken with the Galaxy Watch 4 were very close to the reference medical tool the researchers were using.
Ninety-seven adults with sleep disturbances were enrolled in the study, and seven medical professionals conducted the testing. Another key finding was that wearing the Galaxy Watch 4 tight above the wrist bone improved the accuracy of the SpO2 measurements.
The Galaxy Watch 4 used in the study
Take these results with a healthy grain of salt but there’s no reason not to use your Galaxy Watch (or other similar device) to get a reference point for your blood oxygen levels, especially during sleep. Sleep apnea is a very common condition, affecting between 9 and 38% of the population, and a proper diagnosis could save you a lot of troubles.