PMC10368759_01
Initial sleep diary recording showed a sleep schedule ranging from 3 to 5am bedtime and 10am-1 pm wake up time, consistent with Delayed Sleep-Wake Phase Disorder (DSWPD). Z - sleep.
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Phase Disorder (DSWPD) (Fig. 1). Polysomnography was not performed, as the clinical picture was consistent with DSWPD and there was no indication of other sleep disorders.
Post-intervention sleep diary recording showing a shift in sleep schedule ranging from 12am bedtime and 7am-8am wake up time. M - melatonin, 1 mg dosed at 9 pm; L - light therapy, administered for 1 to 2 h in the morning after waking up; Z - sleep.
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Sleep diaries data showed a progressive shift in sleep schedule ranging from 11 pm to 12am bedtime and 7am-9am wake up time (Fig. 2).