A public health researcher is analyzing new cases of a severe psychological disorder characterized by major disturbances in thought, perception, emotion, and behavior. Based on established epidemiological data for this disorder, explain why the following case is considered statistically typical.

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Schizophrenia affects approximately 1% of the population over a lifetime. The disorder is typically first diagnosed in early adulthood, most commonly in the early to mid-20s.

Prevalence and Onset of Schizophrenia

A community health clinic reviews its data from the past five years and identifies a small group of patients who all received their first diagnosis of a severe psychological disorder between the ages of 20 and 25. Given that this disorder affects approximately 1% of the population over a lifetime, which disorder is most likely being observed in this age group, and why is the age of the patients a significant clue?

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