tedtomato wrote:Well, if you think comparing a fitbit device (which can basically only track motion and hear rate) to a machine with a lot of electrodes connected to your head and body (as well as many other sensors), costing $$$, is a reasonable request, then no, it's not.
You have to adjust your expectations a bit.
I don't have to and won't adjust my expectations. Fitbit is the one touting how accurate it is with the new fancy algorithm to come up with educated guesses as to sleep stages...I just want proof of whatever accuracy it really is.
They meet my expectations or they don't get my money.
Sleep Stages uses accelerometer data, heart rate variability (the time between beats), and proven algorithms to estimate how long you spend in light, deep, and REM sleep stages (as well as time awake) each night.
For Sleep Stages specifically, the Fitbit team conducted extensive internal testing by observing and analyzing several hundred nights of heart rate and movement data from volunteer sleepers while simultaneously comparing that to information gleaned from gold-standard lab equipment. They then used existing research on the connection between heart rate, movement, and sleep stages to develop an automated algorithm that could recognize and track each sleep stage.
They said they could track each sleep stage...I just want to know how accurate it is compared to a EEG sleep study.
I never said it had to match a sleep study exactly. I just want to know how close it comes. I don't think that is an unreasonable request. I actually would be happy with 75% accuracy. I just want to know how much faith I can put in their new fancy algorithm...hey they might be on to something there.
I have no faith in the accelerometer portion by itself. Not since my Fitbit told me I did nearly 8,000 steps when I was on my riding lawn mower.
So when I say I want proof...I want to see how accurate it ends up being when compared to a sleep study for reporting sleep stages. I just want to see how it compares ...I don't expect it to be perfect but I want to know how much faith I can put in whatever it says. That's not unreasonable expectations...that's common sense.