There are three forms of attention deficit hyperactivity disorder (ADHD). These are:
- Predominantly inattentive ADHD is characterized by problems regulating attention.
- Predominantly hyperactive-impulsive ADHD is characterized by impulsive and hyperactive behavior.
- Combined type ADHD is where both inattention and hyperactivity-impulsivity are present.
These different forms of ADHD used to be called ADHD subtypes. Then, when the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) was published in 2013, the term “subtype” was changed to “presentation.” For example, a person could be diagnosed with attention deficit hyperactivity disorder, combined presentation.
Even though the official term is now presented, many people still use the terms “subtypes” and “types.” Occasionally, combined ADHD might be referred to as ADHD C.
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