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Separation anxiety disorder : ウィキペディア英語版
Separation anxiety disorder

Separation anxiety disorder (SAD) is a psychological condition in which an individual experiences excessive anxiety regarding separation from home or from people to whom the individual has a strong emotional attachment (e.g. a parent, caregiver, or siblings). It is most common in infants and small children, typically between the ages of 6–7 months to 3 years. Separation anxiety is a natural part of the developmental process. Unlike SAD (indicated by excessive anxiety), normal separation anxiety indicates healthy advancements in a child’s cognitive maturation and should not be considered a developing behavioral problem.〔Davidson, Tish. "Separation Anxiety." Gale Encyclopedia of Children's Health: Infancy through Adolescence. 2006. Retrieved October 06, 2014 from Encyclopedia.com: http://www.encyclopedia.com/doc/1G2-3447200510.html〕
According to the American Psychology Association, separation anxiety disorder is an excessive display of fear and distress when faced with situations of separation from the home or from a specific attachment figure. The anxiety that is expressed is categorized as being atypical of the expected developmental level and age. The severity of the symptoms ranges from anticipatory uneasiness to full-blown anxiety about separation.
SAD may cause significant negative effects within areas of social and emotional functioning, family life, and physical health of the disordered individual.〔 The duration of this problem must persist for at least four weeks and must present itself before a child is 18 years of age to be diagnosed as SAD in children, but can now be diagnosed in adults with a duration typically lasting 6 months in adults as specified by the DSM-5.〔
==Prevalence==
Anxiety disorders are the most common type of psychopathology to occur in today's youth, affecting from 5–25% of children world-wide.〔 Of these anxiety disorders, SAD accounts for a large proportion of diagnoses. SAD may account for up to 50% of the anxiety disorders as recorded in referrals for mental health treatment.〔 SAD is noted as one of the earliest-occurring of all anxiety disorders. Adult separation anxiety disorder affects roughly 7% of adults. It has also been reported that the clinically anxious pediatric population are considerably larger. For example, according to Hammerness et al. (2008) SAD accounted for 49% of admissions.
Research suggests that 4.1% of children will experience a clinical level of separation anxiety. Of that 4.1% it is calculated that nearly a third of all cases will persist into adulthood if left untreated.〔 Research continues to explore the implications that early dispositions of SAD in childhood may serve as risk factors for the development of mental disorders throughout adolescence and adulthood. It is presumed that a much higher percentage of children suffer from a small amount of separation anxiety, and are not actually diagnosed. Multiple studies have found higher rates of SAD in girls than in boys, and that paternal absence may increase the chances of SAD in girls.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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