Final answer:
The combined presentation in ADHD includes symptoms of both inattentiveness and hyperactivity/impulsivity, surpassing what is typical for the normal developmental stage, with many affected individuals also experiencing comorbid conditions.
Step-by-step explanation:
The characteristics of combined presentation in ADHD refer to individuals who exhibit both inattentive and hyperactive/impulsive symptoms. Unlike some patients who show only inattentive symptoms and are diagnosed with attention deficit disorder (ADD), those with combined presentation of ADHD display inattention (such as lack of focus and executive functioning difficulties) alongside hyperactivity and impulsivity, which surpass what is typical for their developmental level. Additionally, many with ADHD experience comorbidity, developing secondary disorders like depression or obsessive compulsive disorder (OCD).