A sleep diary with nighttime at the top and the weekend in the middle, to better notice trends<unk>  is diagnosed by a clinical interview, actigraphic monitoring, and/or a sleep diary kept by the patient for at least two weeks. When polysomnography is also used, it is primarily for the purpose of ruling out other disorders such as narcolepsy or sleep apnea.<unk>  is frequently misdiagnosed or dismissed. It has been named as one of the sleep disorders most commonly misdiagnosed as a primary psychiatric disorder.See also subsequent:*<unk>  is often confused with: psychophysiological insomnia; depression; psychiatric disorders such as schizophrenia, ADHD or ADD; other sleep disorders; or school refusal. Practitioners of sleep medicine point out the dismally low rate of accurate diagnosis of the disorder, and have often asked for better physician education on sleep disorders. Definition According to the International Classification of Sleep Disorders, Revised (ICSD-R, 2001), the circadian rhythm sleep disorders share a common underlying chronophysiologic basis: Incorporating minor updates (ICSD-3, 2014), the diagnostic criteria for<unk>  are: Some people with the condition adapt their lives to the<unk>  sleep phase, avoiding morning business hours as much as possible. The ICSD's severity criteria are: * Mild: Two-hour delay (relative to the desired sleep time) associated with little or mild impairment of social or occupational functioning. * Moderate: Three-hour delay associated with moderate impairment. * Severe: Four-hour delay associated with severe impairment. Some features of<unk>  which distinguish it from other sleep disorders are: * People with<unk>  have at least a normal—and often much greater than normal—ability to sleep during the morning, and sometimes in the afternoon as well. In contrast, those with chronic insomnia do not find it much easier to sleep during the morning than at night. * People with<unk>  fall asleep at more or less the same time every night, and sleep comes quite rapidly if the person goes to bed near the time they usually fall asleep. Young children with<unk>  resist going to bed before they are sleepy, but the bedtime struggles disappear if they are allowed to stay up until the time they usually fall asleep. *<unk>  patients usually sleep well and regularly when they can follow their own sleep schedule, e.g., on weekends and during vacations. *<unk>  is a chronic condition. Symptoms must have been present for at least three months before a diagnosis of<unk>  can be made. Often people with<unk>  manage only a few hours sleep per night during the working week, then compensate by sleeping until the afternoon on weekends. Sleeping late on weekends, and/or taking long naps during the day, may give people with<unk>  relief from daytime sleepiness but may also perpetuate the late sleep phase. People with<unk>  can be called "night owls". They feel most alert and say they function best and are most creative in the evening and at night. People with<unk>  cannot simply force themselves to sleep early. They may toss and turn for hours in bed, and sometimes not sleep at all, before reporting to work or school. Less-extreme and more-flexible night owls are within the normal chronotype spectrum. By the time those who have<unk>  seek medical help, they usually have tried many times to change their sleeping schedule. Failed tactics to sleep at earlier times may include maintaining proper sleep hygiene, relaxation techniques, early bedtimes, hypnosis, alcohol, sleeping pills, dull reading, and home remedies.<unk>  patients who have tried using sedatives at night often report that the medication makes them feel tired or relaxed, but that it fails to induce sleep. They often have asked family members to help wake them in the morning, or they have used multiple alarm clocks. As the disorder occurs in childhood and is most common in adolescence, it is often the patient's parents who initiate seeking help, after great difficulty waking their child in time for school. The current formal name established in the third edition of the International Classification of Sleep Disorders (ICSD-3) is<unk>  sleep-wake phase disorder. Earlier, and still common, names include<unk>  <unk> ,<unk>  sleep phase syndrome (DSPS), and circadian rhythm sleep disorder,<unk>  sleep phase type (DSPT).
Delayed sleep phase disorder
Insomnia
Circadian rhythm sleep disorder
Non-24-hour sleep–wake disorder
Advanced sleep phase disorder
Shift work sleep disorder
Nightmare disorder
Rapid eye movement sleep behavior disorder