Fig. 1
From: Validity of an algorithm for determining sleep/wake states using FS-760 in school-aged children
Optimization of sleep latency determined by the FS-760 (SLACT). SLACT is the interval between the time lights were turned off and the time of the first SACT (sleep-onset time) among the sleep states that appeared continuously for more than n epoch for the first time after the lights were turned off. The horizontal axis shows the n defined above. The vertical axis shows sleep latency (min) defined for each n. *P < .01 and **P < .001, significant intraclass correlation between sleep latency determined by polysomnography (SLPSG) and SLACT