3 ms·

Thanks! That’s great information. Do you have any data on how that performance compares to medical-grade devices?

• brandonb 1y ago
  The confusion matrix linked above compares the Apple Watch to polysomnography equipment (which is the medical device used in a sleep lab). It doesn't _quite_ answer your question, since we're assuming the polysomnography equipment is ground truth, but it at least gives an idea of the discordance between a consumer device and a medical device.