Minimizing Interrater Variability in Staging Sleep by Use of Computer-Derived Features

摘要

Study Objectives: Inter- scorer variability in sleep staging of polysomnograms (PSGs) results primarily from difficulty in determining whether: (1) an electroencephalogram pattern of wakefulness spans > 15 sec in transitional epochs, (2) spindles or K complexes are present, and (3) duration of delta waves exceeds 6 sec in a 30- sec epoch. We hypothesized that providing digitally derived information about these variables to PSG scorers may reduce inter- scorer variability.