3 ms·
Studies show that some device (like the Fitbit Charge 6, Apple watch) infer sleep stages with a greater than 80% agreement compared to an ECG sleep study. ---
by apatheticonion 3y ago
Studies show that some device (like the Fitbit Charge 6, Apple watch) infer sleep stages with a greater than 80% agreement compared to an ECG sleep study.
--- For primarily younger white males
But still pretty good seeing as they infer this largely from heart rate and movement.