Does this seem high?

[Mom-ninja.]

My sister is taking Abnormal Pysch and her textbook states that 1 in 100 people worldwide have schizophrenia.

 

That number seems very high to me.

[Chris in VA]

From NIMH:

 

Approximately 2.4 million American adults, or about 1.1 percent of the population age 18 and older in a given year have schizophrenia.

 

Don't know the world wide stats.

[*********]

My sister is taking Abnormal Pysch and her textbook states that 1 in 100 people worldwide have schizophrenia.

 

That number seems very high to me.

 

According to NIMH it is 1.1 percent.

 

(National Institute of Mental Health)

 

Wow. That's something, isn't it? I had no idea.

[Perry]

That is a statistic that is often found in textbooks, but it's probably less than that.

Global Schizophrenia Prevalence May Have Been Overstated

Joan Arehart-Treichel

 

 

Although previous studies have led to the common wisdom that schizophrenia affects 1 out of every 100 individuals, new data indicate that this prevalence may be too high.

 

 

 

Schizophrenia may not be as prevalent as generally believed, according to a review of a whopping amount of data from 46 countries.

The study that arrived at this conclusion was conducted by John McGrath, M.D., a professor of psychiatry at the University of Queensland in Australia, and coworkers. Results were published in the May Public Library of Science Medicine.

McGrath and his colleagues systematically reviewed the medical literature on schizophrenia prevalence—that is, the number of people experiencing the illness at a given time or within a time interval—in hopes of coming up with firm figures regarding such prevalence.

This meant that they analyzed 188 studies conducted in 46 countries and published between 1965 and 2002. They also used a sorting algorithm to prevent double-counting of individuals in the same or different studies.

For those studies that reported on lifetime prevalence, the mean lifetime prevalence of schizophrenia (the proportion of individuals in the population who have ever manifested the illness and who are alive on a given day) was 4 per 1,000. DSM-IV-TR states that the lifetime prevalence of schizophrenia is often reported to be 5 to15 per 1,000.

For those studies that reported on point prevalence of schizophrenia (the proportion of individuals who manifest the illness at a given point of time), the mean point prevalence was 4.6 per 1,000. Key policy documents have estimated the point prevalence of schizophrenia to be similar, about 4 per 1,000.

They likewise learned that the lifetime morbid risk of schizophrenia (the probability of a person developing the illness during his or her lifetime) was 7 per 1,000. This estimate corresponds to findings from two other review studies. Moreover, it raises questions about the statement that people often make that “schizophrenia affects about one person in 100,†McGrath and his coworkers pointed out in their report, because the statement is usually based on lifetime morbid risk figures. “If we wish to provide the general public with a measure of the likelihood that individuals will develop schizophrenia during their lifetime, then a more accurate statement would be that `about seven to eight individuals per 1,000 will be affected.'â€

 

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more at link