Delayed sleep phase syndrome (DSPS) is a disorder in which a person’s sleep is delayed by 2 or more hours beyond the socially acceptable or conventional bedtime. This delay in falling asleep causes difficulty in waking up at the desired time. When delayed sleep phase is not the result of another sleeping disorder, people who have it will achieve sleep quality and duration equivalent to those with normal sleeping schedules.
Disease Statistics: Approximately, one-quarter of the general adult population, 40 percent of severely time-stressed people and about 30 percent of shift workers regularly have difficulties going to sleep or staying asleep (Statistics Canada Data).
The treatment of DSP involves the many practices like good sleeping habit, shifting the bed time schedule, advancing the internal clock and staying motivated to stick with the schedule, bright light therapy, avoidance of light in the night , and medications.
Major Research on Disease
The major research on the Delay Sleep phase is on the risk of the relapse, reason for adoption to late sleeping times and the impact on the patients.