Delayed Sleep-Wake Phase Disorder Diagnosis and Characteristics

Core Clinical Features

Patients with Delayed Sleep-Wake Phase Disorder (DSWPD) experience difficulty falling asleep at required bedtimes and extreme difficulty waking at required times, though sleep quality and quantity are typically normal when following their preferred delayed schedule, according to the American Academy of Sleep Medicine 1
The American Academy of Sleep Medicine notes that patients with DSWPD complain of difficulty falling asleep at times required to obtain sufficient sleep duration on school or work nights 1
The American Academy of Sleep Medicine also states that patients with DSWPD experience difficulties arising at required times in the morning 1
When allowed to follow their preferred schedule, sleep quality and quantity are typically reported as normal by patients with DSWPD, as stated by the American Academy of Sleep Medicine 1

The American Academy of Sleep Medicine explains that DSWPD manifests as a delay of the major sleep episode with respect to the patient's desired timing or the timing required to attend to social, educational, and/or occupational demands 2
The American Academy of Sleep Medicine recommends actigraphy-derived data when possible, including both work/school and free days, to provide objective longitudinal documentation of sleep-wake patterns 2
The American Academy of Sleep Medicine suggests that circadian phase assessments, such as dim light melatonin onset (DLMO), are recommended if feasible 2
Sleep diaries for at least 7 days are essential for diagnosis, as recommended by Praxis Medical Insights 3