The sleep periods predicted in the second procedure are generated such that their combined sum is a priori equivalent to the total amount of sleep predicted in the first procedure.
TSP and TST, i.e., the sum of all sleep periods assessed by electroencephalogram, were significantly higher in dipper patients (TSP 497 ± 30 and 407 ± 44 min, P < 0.001, TST 425 ± 82 and 356 ± 72 min, P = 0.03, for dippers and nondippers, respectively).
These durations were also expressed as percentages of total sleep duration, defined as the summed duration of sleep stages I, II, III, and REM.
A score of ≥ 5 on the PSQI total scale, which is computed as a sum of the seven subscales (e.g., sleep quality, sleep latency, sleep duration, sleep disturbance, sleep efficiency, and use sleep medication) is associated with clinically significant sleep disruptions, including insomnia and major mood disorders.
Macbeth couldn't have summed up the importance of sleep any better.
where P Slj is the power dissipation of interface j during sleep state and M is the number of interfaces equipped on the MT. The summation in the equation represents the sum of power dissipation during sleep state in all other inactive interfaces.
SWS was calculated as the sum of time spent in sleep stages S3 and S4.
Total sleep time was calculated as the sum of all epochs scored as sleep.
The polygraphic sleep parameters were six sleep stages in minutes, sleep latency, REM latency, REM cycle, REM duration, frequency and duration in minutes of awakening during sleep, total sleep time, number of sleep stage shifts, sleep efficiency, number of sleep spindles and density.
These data were then aggregated by cluster to capture information on the survey location, sample size, and the sum of persons who reported to sleep under an ITN the night before the survey.
