The diagnostic criteria of insomnia include difficulty falling asleep, difficulty maintaining sleep, and early-morning awakening with an inability to fall back to sleep. In both children and adolescents, psychological and medical factors can contribute to insomnia. Insomnia in adolescence is often triggered or exacerbated by irregular sleep schedules. Sleep difficulties in childhood can result from conditioning factors (a child who does not learn to fall asleep or return to sleep without the presence of a parent, for example) or from the absence of consistent sleep schedules and bedtime routines. The type of symptom changes because of age, with difficulties initiating sleep being more common among young adults and problems maintaining sleep occurring more frequently among middle-aged and older individuals.ĭifficulties initiating and maintaining sleep can also occur in children and adolescents, but there are more limited data on prevalence, risk factors, and comorbidity during these developmental phases. Insomnia complaints are more prevalent among older adults. Many people with insomnia have a history of "light" or easily disturbed sleep prior to the onset of more persistent sleep problems. The characteristics of insomnia may also change over time. Even when the course of insomnia has become chronic, there is night-to-night variability in sleep patterns, with an occasional restful night's sleep interspersed with several nights of poor sleep. Chronicity rates range from 45 percent to 75 percent for follow-ups of one to seven years. The course of insomnia may also be episodic, with recurrent episodes of sleep difficulties associated with the occurrence of stressful events. In some cases, insomnia may also onset without any identifiable triggering factor. For instance, insomnia that occurs during an episode of major depressive disorder can become a focus of attention, with consequent negative conditioning, and persist even after resolution of the depressive episode. A similar course may develop in the context of acute psychological stress or a mental disorder. Conditioned arousal may then persist and lead to persistent insomnia. For example, an individual who is bedridden with a painful injury and has difficulty sleeping may then develop negative associations with sleep. The factors that precipitate insomnia may differ from those that perpetuate it. For some individuals, perhaps those more vulnerable to sleep disturbances, insomnia may persist long after the initial event, possibly because of conditioning factors and heightened arousal. It usually resolves once the initial event subsides. Situational or acute insomnia usually lasts a few days or a few weeks and is often associated with life events or rapid changes in sleep schedules or environment. Insomnia can be situational, persistent, or recurrent. Insomnia may also have a late-life onset, which is often associated with the onset of other health-related conditions. In women, new-onset insomnia may occur during menopause and persist even after other symptoms, such as hot flashes, have resolved. Less frequently, insomnia begins in childhood or ad& shy olescence. The onset of insomnia symptoms can occur at any age, but the first episode is more common during young adulthood. Insomnia is considered to be recurrent if two or more episodes occur within the space of one year. If the symptoms last three months or longer, the insomnia is said to be persistent. Insomnia lasting from one month to three months is episodic. Insomnia can be classified as episodic, persistent, or recurrent. Individuals vary in their need for and satisfaction with sleep, but individuals with insomnia experience distress or impairment in functioning as a result of their poor sleep. Insomnia is not defined by the hours of sleep a person gets or how long it takes to fall asleep. In 2014, approximately 35 percent of adults reported getting insufficient sleep. Approximately 70 million Americans are thought to have a sleep or wakefulness disorder, according to the Centers for Disease Control and Prevention. All of these symptoms can lead to daytime drowsiness, poor concentration, irritability, and the inability to feel refreshed and rested upon awakening. For insomnia to be diagnosed, these symptoms must be present at least three nights per week and the sleep difficulty present for at least one month. Insomnia is the feeling of inadequate or poor sleep because of one or more of the following: trouble falling asleep trouble remaining asleep awakening too early or non-restorative sleep.
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