Accuracy of Wristband Fitbit Models in Assessing Sleep: Systematic Review and Meta-Analysis.
Shahab HaghayeghSepideh KhoshnevisMichael H SmolenskyKenneth R DillerRichard J CastriottaPublished in: Journal of medical Internet research (2019)
Sleep-staging Fitbit models showed promising performance, especially in differentiating wake from sleep. However, although these models are a convenient and economical means for consumers to obtain gross estimates of sleep parameters and time spent in sleep stages, they are of limited specificity and are not a substitute for PSG.