Validation of Sleep-Tracking Technology Compared with Polysomnography in Adolescents

“…The results of this study show that the wristbased UP can assess sleep and wake to an accuracy of 86% when compared to PSG. Consistent with the few previous studies validating commercial accelerometer devices, [18][19][20] the UP showed greater sensitivity, accurately assessing sleep 92% of the time, than specificity, accurately assessing wake only 66% of the time. In the current study, the sensitivity and specificity results were equivalent to actigraphy, as measured with the Actiwatch2 device, when data were assessed at the medium wake threshold (93% sensitivity, 63% specificity, activity counts = 40).…”