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What Percent Of The Population Has Schizophrenia

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Top Ten Schizophrenia Stats To Know In 2021

  • Around 20 million people in the world have schizophrenia.
  • Based on schizophrenia statistics by state, California has the highest number of adults with this condition.
  • There are four types of schizophrenia.
  • Around 50% of individuals living with schizophrenia have a history of substance abuse.
  • African American patients are three to four times more likely to be diagnosed with psychotic disorders.
  • Around 5% to 6% of schizophrenia patients die by suicide.
  • Total costs of schizophrenia amount to nearly $63 million a year.
  • There is no cure for schizophrenia.
  • 20% of people with schizophrenia will recover within five years from experiencing the first symptoms.
  • Interesting facts about schizophrenia point out that high doses of vitamin B can considerably reduce the symptoms.

A Future After Schizophrenia

  • 1 out of every 4 people who are diagnosed with schizophrenia will completely recover within 10 years.
  • Another 1 out of every 4 people with schizophrenia are rated as being much improved and can live a mostly independent life.
  • Only 15% of those with schizophrenia will still be unimproved and hospitalized after 10 years from their first diagnosis.
  • About 1 out of 10 people diagnosed with schizophrenia will take their own lives within the first decade of their diagnosis.
  • When extended out to 30 years after first diagnosis, those who are greatly improved increases from 50% to 55%. Hospitalizations decrease by 5%, but suicides increase by 5%.
  • 6%. This is the percentage of people with schizophrenia who are homeless. Another 6% live in prison.

Once a schizophrenia diagnosis is confirmed, only 28% of those with this diagnosis are able to live independently on their own. About 200k people with this mental disorder are homeless. More people are not being treated for their mental disorder than are being treated. 1 out of every 3 psychiatric hospital visits is because of schizophrenia and this accounts for 25% of all mental health costs. Estimates place a potential cure for this mental disorder being discovered within the next decade it cant come soon enough for the demographics of schizophrenia.

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What Is Mental Health

Mental health includes our emotional, psychological, and social well-being. It affects how we think, feel, and act. It also helps determine how we handle stress, relate to others, and make healthy choices.1 Mental health is important at every stage of life, from childhood and adolescence through adulthood.

Although the terms are often used interchangeably, poor mental health and mental illness are not the same. A person can experience poor mental health and not be diagnosed with a mental illness. Likewise, a person diagnosed with a mental illness can experience periods of physical, mental, and social well-being.

Schizophrenia Statistics By State Show That California Has The Most Adults With This Condition

Schizophrenia Facts and Statistics

With 335,242 adults diagnosed with schizophrenia, California has the highest incidence. The 2017 Census data also shows that Texas is second with 230,324 cases and Florida comes third with 184,607. On the other hand, Wyoming has the lowest prevalence rate of schizophrenia only 4,871 cases in 2017. Sadly, 1,948 of those cases were untreated.

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Disease Burden Of Mental Health And Substance Use Disorders

Health impacts are often measured in terms of total numbers of deaths, but a focus on mortality means that the burden of mental health disorders can be underestimated.2 Measuring the health impact by mortality alone fails to capture the impact that mental health disorders have on an individuals wellbeing. The disease burden measured in Disability-Adjusted Life Years considers not only the mortality associated with a disorder, but also years lived with disability or health burden. The map shows DALYs as a share of total disease burden mental and substance use disorders account for around 5 percent of global disease burden in 2017, but this reaches up to 10 percent in several countries. These disorders have the highest contribution to overall health burden in Australia, Saudi Arabia and Iran.

In 2017, an estimated 264 million people in the world experienced depression. A breakdown of the number of people with depression by world region can be seen here and a country by country view on a world map is here.In all countries the median estimate for the prevalence of depression is higher for women than for men.

DALYs from depression

The chart found here shows the health burden of depression as measured in Disability Adjusted Life Years per 100,000. A time-series perspective on DALYs by age is here.

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Current Methods For Genetic Analysis Of Complex Disorder

Available methods generally rely on the analysis of DNA markers in subject to determine whether the distribution of marker alleles in some way predicts the presence of disease. Some studies consider DNA variations within or near candidate gene. Many groups are now examining maps of the DNA markers throughout the genome to identify chromosomal regions likely to contain loci that have a major influence on susceptibility. These studies rely on the phenomenon of linkage, as exemplified by the fact that when ill parent transmits a disease-causing allele to children, numerous alleles at nearby loci are also transmitted because no recombination event has occurred in the region .

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How Are Psychotic Disorders Diagnosed

If the symptoms of a psychotic disorder appear in an individual, the doctor will conduct a physical exam as well as gather medical history. Once physical reasons for the abnormal behaviors are ruled out, the doctor will then refer the patient to a psychiatrist. Psychiatrists have a specific set of tools to properly diagnose a psychotic disorder.

Pedigree Studies: Lod Score Methods

Is Schizophrenia Hereditary? | Schizophrenia

In pedigrees with multiple ill individuals, the LOD score method can be used to determine whether the distribution of DNA markers alleles within each pedigree predicts presence of disease. The LOD score is based on a mathematical model of the mode of inheritance . Our uncertainty of the precise mode of inheritance in complex genetic disorder such as schizophrenia introduce the possibility of mis-specifying the model, resulting in inappropriate linkage data.

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Schizophrenia In Popular Culture

Over the years, schizophrenia has made many appearances in movies and popular culture. The life of John Nash, a mathematician who lived with paranoid schizophrenia, is portrayed in the film A Beautiful Mind. Nash is shown to be highly intelligent and able to combat his illness with treatment, but the media often depicts those with schizophrenia as unstable or incurable, which may contribute to the stigmatizing idea that people with schizophrenia are “crazy” or dangerous.

The movie Shutter Island, a popular psychological thriller, also portrays an individual who lives with schizophrenia. The story follows a man who is hospitalized on Shutter Island in an institution for criminals who experience various debilitating mental health issues. The main character shows many positive symptoms of schizophrenia, with the dominant one being the delusion that someone on the island is trying to manipulate him.


Positive Symptoms Of Schizophrenia Include:

  • Hallucinations sensory errors where a person thinks they hear, see, smell, taste or feel things that are not present
  • Delusions strong beliefs about people or things which are unrealistic or not supported by facts
  • Thought problems different from delusions, thought disorders involve a person being very disorganized, stopping their train of thought or making up new words
  • Movement issues repeating specific movement or not moving at all for long periods

The negative symptoms of schizophrenia include losing some feelings and interest the person previously had.

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Data Source And Selection Process

The electronic search was performed in the electronic databases . We conducted our search in PubMed using the following terms: ) AND ) AND . Embase and Scopus were searched using specific-subjects headings suitable for the databases. We also performed a manual search to supplement our electronic database search.

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How Does Schizophrenia Rank In Prevalence With Other Mental Disorders

Schizophrenia and Dangerous Behaviour

According to estimates from Johns Hopkins, about 26 percent of Americans who are 18 or over will suffer from a diagnosable mental disorder in a single year. Some people may even suffer from more than one mental or mood disorder at a time. To put U.S. schizophrenia statistics in context with other mental health conditions, consider these numbers:

  • 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

Taken together, more than 46 million Americans will experience a mental health disorder in a given year.

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Schizophrenia And Dangerous Behaviour

Schizophrenia and Dangerous Behaviour

It is one of the commonest and most enduring myths around schizophrenia that all people suffering from this condition are violent. In public opinion schizophrenia is most often associated with violence than with any other type of disordered behaviour.

This is undoubtedly fed and reinforced by rancorous and ill-informed media reporting of the subject. Articles and current affairs programmes that focus on violence in schizophrenia whilst ignoring all of the other features of this complex condition, particularly the high suicide rate and telling us very little about the illness in general, are sadly all too common. A study carried out in 1994 of the British news media found that stories about violence by people with schizophrenia outweighed sympathetic news stories about the condition by about four to one.11

Sadly this subject is one that many people engaged in the caring professions feel particularly uncomfortable discussing. Dangerous behaviour is very often seen by them as a failure on the part of the doctors rather than as a feature of a society which undervalues people with mental illness and under-funds mental health services. In addition, at times of tragedy, they are often faced with hostile reporting by the media which seeks to point fingers of blame at the doctors rather than at societys attitudes to treating mental illness.

Are people with schizophrenia dangerous?

Schizophrenia and suicide

Schizophrenia and violence


More Important Facts About Schizophrenia

Although the movies might turn paranoid schizophrenia into a good character plot point so they can perform violent acts, the vast majority of those who have this disorder are not going to do anything.

The most important part of treatment for paranoid schizophrenia isnt to get medication, but to attend regular therapy sessions. Cognitive behavioral therapy, for example, can help people be able to find negative thinking errors that are causing some of the difficult emotions. Group supports and therapies also provide a remarkable amount of proactive benefits that can help people prevent a new outbreak of symptoms from occurring.

One of the primary issues that schizophrenics face is the fact that many things can trigger a new episode of symptoms for them. This is why getting off of a drug habit can be so difficult for them. Something as simple as the withdrawal symptoms of nicotine can be enough to trigger another paranoid episode and even start hallucinations. Although substance abuse isnt thought to cause schizophrenia, it can enhance the problem when it is already there.

It may take some time, some medication, and a lot of patience, but paranoid schizophrenia does not have to define the life of someone.

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What Is The Prognosis For Those With Psychotic Disorders

Many people who have been diagnosed with a psychotic disorder tend to lead productive lives and function normally with the proper treatment. The prognosis for those with psychotic disorders varies from person to person. For example, women tend to respond better to medication than men. Those with a family history of illness have a lower prognosis than those without. The number of negative symptoms also determines the individual prognosis as well as age the older the patient, the more promising prognosis. Another important factor in determining prognosis is the individuals support system. Most will never fully recover from or be cured of psychotic disorders and will need to continue treatment for the duration of their lives. To maintain mental and physical stability with the condition, it is important for patients to strictly follow the treatment of psychotic disorders recommended by their healthcare providers.

For more on the topic of Psychotic Disorders, weve included the following expert consensus documents as reference materials:

Schizophrenia Is Very Treatable

What is Schizophrenia?

Despite its infamy for being a dangerous mental illness, schizophrenia can be a very treatable condition. The overall success rate for schizophrenia treatment is actually higher than that of heart disease, around 60% compared to 41%-52%.

However, the stigma surrounding schizophrenia can make it extremely difficult for many to get proper treatment. In fact, the World Health Organization reports that nearly 70% of people with schizophrenia are not receiving proper care. They also state that nearly 90% of those not receiving care fall into the lowest income communities.

Understanding the real schizophrenia facts can help break the stigmas surrounding this mental disorder, and get more people to understand how treatable it really is.

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There Are Four Different Types Of Schizophrenia

This disorder exhibits different symptoms for everyone. However, there are four major categories into which patients generally fall:

  • Paranoid schizophrenia. Facts show its main characteristics paranoia, suspicion, and fear of other peoples intentions.
  • Catatonic schizophrenia. It causes people to shut down physically, as well as emotionally and mentally.
  • Undifferentiated schizophrenia. It displays different symptoms, like confusion, paranoia, or abnormal behavior.
  • Schizoaffective disorder. Delusions and hallucinations might come hand in hand with at least one symptom of a mood disorder, such as depression and mania.

Significant Paranoid Schizophrenia Statistics

Paranoid schizophrenia tends to be the type of schizophrenia that gets the most publicity, but there are actually 4 other types of this mental disorder that are diagnosed as well. It isnt a very common disorder of the mind, but it is present in enough people that it can impact many people at least on some level. When treated appropriately, people with this disorder can go on to live fulfilling, happy lives. Without treatment, however, the effects of this disease can begin to overwhelm someone quickly.

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There Is No Cure For Schizophrenia

Even though there isnt a cure for this disorder, schizophrenia is still a treatable and manageable disease. Taking antipsychotic schizophrenia medication is one of the essential steps. That said, it shouldnt be the only method of treatment. A combination of community support, healthy and balanced nutrition, and self-care are just as important.

The Basic Genetics Of Schizophrenia

6 Schizophrenia Symptoms

Schizophrenia aggregates in the families with no known familial subtypes. Twin and adoption studies have shown that this familiarity is explained predominantly by genetic factors, with estimates of genetic contribution ranging from 60 to 80%. However, these data do not follow a simple recessive or dominant pattern. If it were simple recessive, the frequency in children of two schizophrenic parents would be 100%, but is actually under 40% if it were simple dominant, 50% of the offspring of one schizophrenic parent would be affected and each person with schizophrenia would have one ill parent . Moreover, the prevalence in offspring is too low to be consistent with the high monozygotic twin concordance rate. Thus, the genetic effect is not completely penetrant indicating that many relatives of people with schizophrenia may carry silent genetic susceptibility. Detail of the risk of illness among relatives with schizophrenia is shown in . A further complication is the epidemiological evidence that, while a high population prevalence has been maintained, the reproductive rate of people with schizophrenia is low.

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Many People With Schizophrenia Have Other Mental Illnesses

Given the popularization of schizophrenia by television and movies, people are often quick to assume that everyone who is a schizophrenic suffers from the same symptoms. This is simply not the case. In fact, people with schizophrenia often suffer from other mental illnesses at a much higher rate than the general population.

The following represents the percentage of people with schizophrenia who also suffer from a mental illness:

With such a high risk for other serious mental illnesses like depression, its important to understand just how treatable schizophrenia can be. Part of the misconception around this mental illness is that there is nothing to be done about it, but schizophrenia is treatable. And when people understand real schizophrenia facts, it becomes easier for individuals in need to get help.

Risk Factors Etiology And Pathophysiology

Schizophrenia has a prevalence of 1 percent in all cultures and is equally common in men and women.1 Men typically present with the disease in their late teenage years or early 20s, whereas women generally present in their late 20s or early 30s.

A family history of schizophrenia is the most significant risk factor .3 Other hypothetical risk factors include season and location of birth, socioeconomic status, and maternal infections. However, data supporting these ideas are inconclusive.3,4

Third-degree relative

Second-degree relative

2 to 6

First-degree relative

6 to 17

Third-degree relative

Second-degree relative

2 to 6

First-degree relative

6 to 17

Information from reference 2.

Schizophrenia appears to be a polygenic disorder with environmental and developmental factors mediating a person’s likelihood of becoming schizophrenic.2 It is unknown if the range of severity and clinical manifestations reflect problems in different brain regions, in different causalities, or in different diseases that share some phenotypic features.2

The neurotransmitter dopamine also plays an important role. For example, drugs that cause psychoses similar to the positive symptoms of schizophrenia increase dopaminergic neurotransmission, and almost all antipsychotics decrease dopaminergic neurotransmission.9 Still, dopaminergic pathways cannot entirely explain the pathophysiology of schizophrenia, and the roles of other neurotransmitters are being investigated.9

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