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Attention deficit hyperactivity disorder predominantly inattentive : ウィキペディア英語版 | Attention deficit hyperactivity disorder predominantly inattentive
Attention deficit hyperactivity disorder predominantly inattentive (ADHD-PI), formerly attention deficit disorder without hyperactivity, is one of the three subtypes of attention deficit hyperactivity disorder (ADHD). The term was formally changed in 1994 in the new ''Diagnostic and Statistical Manual of Mental Disorders'', fourth edition (''DSM-IV''), to "ADHD predominantly inattentive" (ADHD-PI or ADHD-I). 'Predominantly inattentive' is similar to the other subtypes of ADHD except that it is characterized primarily by inattentive concentration or a deficit of sustained attention, such as procrastination, hesitation, and forgetfulness; it differs in having fewer or no typical symptoms of hyperactivity or impulsiveness. Lethargy/fatigue is sometimes reported, but ADHD-PI is a separate condition from the proposed cluster of symptoms known as sluggish cognitive tempo (SCT). == Classification == ADHD-PI is an attention-concentration deficit that has everything in common with other forms of ADHD except that it has fewer hyperactivity or impulsivity symptoms and has more directed attention fatigue symptoms. Different countries have used different ways of diagnosing ADHD-PI. In the United Kingdom, diagnosis is based on quite a narrow set of symptoms, and about 0.5–1% of children are thought to have attention or hyperactivity problems.
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