Wearable sleep trackers have some value but lack transparency for decision-making.

“I would actually predict those things will reach a level of accur equivalent to the PSG in the next couple of years and probably we'll get FDA approval to be able to diagnose officially Sleep Disorders that's my total my my prediction from some inside information I don't know that to be true but it is getting a lot better”

“the Sleep trackers of various kinds have certainly been able to pull out information about rapid eye movement and other stages of sleep I mean key metrics not every metric not what you would get with person wearing a EEG”

“Their accuracy for the stages is still questionable. It depends on the device. They're getting better though.”

“My understanding is that it's more accurate than if the tracker is on a limb where you could be moving because that will disrupt sleep stage measurement. Um but I don't know if that's actually true or not.”

“EKG and sleep, of course, super important. Their accuracy for the stages is still questionable. It depends on the device.”

“Each wearable is different so don’t worry much about the absolute score but on the metrics of sleep onset, deep, REM, WASO”

“these things are still not quite at the level of the poly some and maybe they never will be”

“the track is out there right now you know that just not quite accurate they're not clinical grade enough for me to understand the quality and the stages of your sleep I think trackers are not bad right now and but even those metrics you'd get a clue right like even with the F somewhat of a clue yeah you can see it”

“they're very good at tracking duration of sleep and obviously not entirely accurate on staging but pretty good”

“most of them right now use a combination of your heart rate, which you can pick up through the pulse waveform either on the wrist or on the finger, or if it's a bed sensor, through the heartbeat, as well as respiration. And they'll use a combination of those things together with movement to try and stage your sleep.”

“They either overestimate or underestimate sleep onset latency, how long it takes you to fall asleep. They either overestimate or underestimate the amount of time that you've been awake. Sleep duration may not be bad with some of them, total sleep duration, but once you get into the sleep stages, that's where things become more inaccurate. Their ability to separate non-REM from REM, it is getting better. It could be in the region of sort of 60% accuracy, possibly lower.”

“Their ability to separate non-REM from REM, it is getting better. It could be in the region of sort of 60% accuracy, possibly lower. But right now, we're not there yet.”

“They probably aren't useless. They probably have value and they're probably not all incorrect either. It's just you gave me a number and I don't know what to do with it.”

“the accuracy of these sleep st being able to measure sleep stages anywhere between I maybe 60 to 80% which isn't terrible.”