5 ms·
Another view on the Oura thing: https://www.medpagetoday.com/practicemanagement/informationtechnology/78317 https://www.medpagetoday.com/practicemanagement/info
by DenisM 7y ago
Another view on the Oura thing: https://www.medpagetoday.com/practicemanagement/informationtechnology/78317 https://www.medpagetoday.com/practicemanagement/informationt...
It's rather skeptical. Choice quote:
[...] The SRI researchers studied 41 healthy adolescents and young adults (average age 17). Sleep data were recorded using the Oura ring and standard PSG on a single laboratory overnight. Metrics were compared using Bland-Altman plots and epoch-by-epoch analysis.
The ring accurately detected "light" and "deep" sleep in 65% and 51% of the sleep epochs, respectively. It also accurately detected 61% of REM sleep epochs, with an overall overestimation of PSG REM sleep (by about 17 min). When the ring misclassified PSG REM sleep, the algorithm usually classified the epoch as "light sleep" (76%).
These data suggest that the Oura Ring is virtually useless in telling you if you are in REM sleep versus deep or light sleep. [...]
- neves 7y agoI have a cheap Mi Band 2 and I'm impressed with how well it measures when I'm sleeping and when I'm awake. I don't know how good it is to measure deep sleep. I does not pretend to measure REM. Are there any weareable device that measures it well?
- rootusrootus 7y agoI use an Apple Watch and an app called Pillow and it does a plausible job of guessing when I went to sleep and when I woke up. It also identifies light/deep sleep and REM, but I have no way of telling how accurate. It seems to detect awake periods at night as well as I can remember them. But ... I kinda assume it's a crapshoot and I use it more as a novelty and an estimate of total sleep than any kind of accurate representation of sleep cycles.
- RandallBrown 7y agoIt doesn't matter so much how accurate it is, as long as it's consistently inaccurate. I don't care if my scale at home is perfectly accurate. I care about knowing that my weight is going up/down.
- dmix 7y agoAt 50-65% accuracy rates it’s pretty useless even for binary decision making (better/worse).
- pmiller2 7y agoI care if my scale at home is accurate. I don't want to know if my weight is going up or down, I want to know what I currently weigh so I can decide what I need to do about it.
- blackflame7000 7y agoCant you just use the mirror for that?
- warkdarrior 7y agoHard to use a mirror in your sleep.
- blackflame7000 7y agoUhh what? They were talking about weight
- mffnbs 7y agoIt's also difficult to weigh yourself with a mirror.
- ibeckermayer 7y agoYour mirror’s hard? Let me take a rain check on that, mine’s sleeping.
- rconti 7y agoYour example seems to disagree with your premise. If someone tells me I weigh "9239" this means nothing to me, unless in context of whether it's going up or down, and how it is related to others of my height (and age and gender, perhaps). I don't care that I weigh some multiple of an SI unit, or some fraction of a car. I care about my weight relative to others and my history.
- e40 7y agoI was using a Fitbit Charge (the one before the just released one). One night I was awake looking at my phone from 1-3am and it said I was asleep. Took it off and put it into a drawer right then.
- JakeTheAndroid 7y agoI just got the Charge 3 and I must toss and turn like crazy because it sometimes doesn't even register my sleep. I didn't expect it to be the most accurate sleep tracker, so I am not super upset. It still gives me some level of insight into my sleep, which is better than nothing.
- brlewis 7y ago>I didn't expect it to be the most accurate sleep tracker I work for Fitbit. I don't speak for Fitbit, but in my opinion you should expect it to be the most accurate sleep tracker, and if it isn't you should contact customer service.
- JakeTheAndroid 7y agoMaybe I will then. I just assume that the technology to accurately determine REM vs Deep or Light sleep is not really available, so I can't fault Fitbit or any manufacturer for not having perfect sleep trackers. But, the marketing material does claim it's very accurate, so I should probably get more out of it since that's what I was sold. Thanks for the advice.
- Symmetry 7y agoI've got a Charge 3, the one with the oxygen sensor, and I've also seen it think I was asleep when I wasn't. On the other hand, it seems weirdly reliable at telling if I'm in REM sleep or not. Whenever I wake up directly from what it says was REM sleep I remember my dreams but not otherwise.
- arkaic 7y agoOn the contrary, my Charge 2 is generally pretty accurate in terms of when I'm asleep vs awake.
- not_a_moth 7y agoMatthew Walker, probably the best known sleep scientist, has been critical of Oura and pretty much all the sleep trackers for sleep phase data. Unsurprisingly, it's difficult to guess at brain EM wave patterns from a band on the finger, wrist, etc. I'm 6 months on Oura, and I don't think it's actually that consistent, i.e. I don't think you can say "Oura shows 50% more deep sleep today, so even if the base mumber is wrong, I must have gotten 50% more deep sleep". I wear a fitbit to cross validate each night, and the readings on both often contradict each other seemingly arbitrarily, night to night. Overall I've found they're great for tracking overall sleep time (HRV, heart rate, temp too) but I don't read too much into the actual sleep phase data. (Day-to-day self asessment of cognitive performance is probably the best proxy.)
- abhimanyugrover 7y ago> Day-to-day self asessment of cognitive performance is probably the best proxy. How do you do that?
- krageon 7y agoMeasure it using a series of cognitive performance tests. You could even just grade your own experience day to day - assuming you feel everything is a little worse when you sleep poorly (a sensible assumption), you will probably get representative data.