Schizophrenia is a severe mental illness characterized by a variety of symptoms, including loss of contact with reality, bizarre behavior, disorganized thinking and speech, decreased emotional expressiveness, and social withdrawal. Usually only some of these symptoms occur in any one person. The term schizophrenia comes from Greek words meaning "split mind". However, contrary to common belief, schizophrenia does not refer to a person with a split personality or multiple personality.
To observers, schizophrenia may seem like madness or insanity. Perhaps more than any other mental illness, schizophrenia has a debilitating effect on the lives of the people who suffer from it. A person with schizophrenia may have difficulty telling the difference between real and unreal experiences, logical and illogical thoughts, or appropriate and inappropriate behavior. Schizophrenia seriously impairs a person's ability to work, go to school, enjoy relationships with others, or take care of oneself. In addition, people with schizophrenia frequently require hospitalization because they pose a danger to themselves. About 10 percent of people with schizophrenia commit suicide, and many others attempt suicide.
Once people develop schizophrenia, they usually suffer from the illness for the rest of their lives. Although there is no cure, treatment can help many people with schizophrenia lead productive lives. Schizophrenia also carries an enormous cost to society. People with schizophrenia occupy about one-third of all beds in psychiatric hospitals in the United States. In addition, people with schizophrenia account for at least 10 percent of the homeless population in the United States (see Homelessness). The National Institute of Mental Health has estimated that schizophrenia costs the United States tens of billions of dollars each year in direct treatment, social services, and lost productivity.
Prevalence Approximately 1 percent of people develop schizophrenia at some time during their lives. Experts estimate that about 1.8 million people in the United States have schizophrenia. The prevalence of schizophrenia is the same regardless of gender, race, and culture. Although women are just as likely as men to develop schizophrenia, women tend to experience the illness less severely, with fewer hospitalizations and better social functioning in the community. Symptoms Schizophrenia usually develops in late adolescence or early adulthood, between the ages of 15 and 30. Much less commonly, schizophrenia develops later in life.
The illness may begin abruptly, but it usually develops slowly over months or years. Mental health professionals diagnose schizophrenia based on an interview with the patient in which they determine whether the person has experienced specific symptoms of the illness. Symptoms and functioning in people with schizophrenia tend to vary over time, sometimes worsening and other times improving. For many patients the symptoms gradually become less severe as they grow older.
About 25 percent of people with schizophrenia become symptom-free later in their lives. A variety of symptoms characterize schizophrenia. The most prominent include symptoms of psychosis-such as delusions and hallucinations-as well as bizarre behavior, strange movements, and disorganized thinking and speech. Many people with schizophrenia do not recognize that their mental functioning is disturbed.