AP PSYCHOLOGY

Detailed explanation-1: -Although it affects barely 1% of the population, it is one of the most disabling diseases affecting humankind. Schizophrenia is a chronic and severe neurological brain disorder estimated in 2020 to affect 1.1 percent of the population or approximately 2.8 million adults in the United States aged 18 or older.

Detailed explanation-2: -Some people with schizophrenia experience worsening and remission of symptoms periodically throughout their lives, others a gradual worsening of symptoms over time. Schizophrenia affects approximately 24 million people or 1 in 300 people (0.32%) worldwide. This rate is 1 in 222 people (0.45%) among adults (2).

Detailed explanation-3: -1.1 percent of American adults have been diagnosed with schizophrenia. 18.1 percent of American adults have been diagnosed with an anxiety disorder. 6.9 percent of the U.S. adult population has been diagnosed with major depression. 2.6 percent of American adults are living with bipolar disorder.

Detailed explanation-4: -Schizoaffective is relatively rare, with a lifetime prevalence of only 0.3%. Men and women experience schizoaffective disorder at the same rate, but men often develop the illness at an earlier age.