Epoch-by-Epoch Sleep/Wake Agreement between Armband, Actiwatch and PSG.

Sensitivity is the proportion of “sleep” epochs as defined by PSG that were judged as “sleep” by Armband/Actiwatch. Specificity is the proportion of the “wake” epochs as defined by PSG that were judged as “wake” by Armband/Actiwatch. Agreement is proportion of epochs where there was agreement between PSG and instrument. PABAK is the prevalence and bias adjusted kappa.