How accurate is Fitbit sleep?

Online Answer
In reference to PSG, nonsleep-staging Fitbit models correctly identified sleep epochs with accuracy values between 0.81 and 0.91, sensitivity values between 0.87 and 0.99, and specificity values between 0.10 and 0.52..
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FitPoints are personalized FitPoints takes into account your height, weight, age, and sex, as well as the type of exercise you're doing and the duration, to calculate a personalized amount of FitPoints for all of the activities you track. And no matter what activity you choose, you'll earn FitPoints for doing it..
In reference to PSG, nonsleep-staging Fitbit models correctly identified sleep epochs with accuracy values between 0.81 and 0.91, sensitivity values between 0.87 and 0.99, and specificity values between 0.10 and 0.52..