Psychosis is a symptom, and schizophrenia is a diagnosis that includes it. Every case of schizophrenia involves psychosis at some point, but most psychosis is not schizophrenia: in a Finnish population study, 3.06 percent of people had a psychotic disorder at some point in their lives and 0.87 percent had schizophrenia. [perala-2007-prevalence] This guide explains how the two terms relate, how doctors decide between them, and why the label given after a first episode so often changes.
What is the difference between psychosis and schizophrenia?
Psychosis is a set of experiences, and schizophrenia is a diagnosis made when a particular pattern of those experiences lasts long enough to disrupt daily life. The relationship is the one chest pain has to a heart attack: one is what a person feels, the other is one of several possible explanations for it.
Psychosis means a loss of contact with shared reality. It shows up as hallucinations (perceptions with no outside source, most often hearing voices), delusions (beliefs held firmly against strong evidence) and disorganised speech or thinking.
Schizophrenia is diagnosed when two or more characteristic symptoms are present, at least one of them a hallucination, a delusion or disorganised speech. The others that can count are very disorganised or catatonic behaviour and negative symptoms such as reduced motivation and flattened emotion. The diagnosis also needs a clear drop in everyday functioning, a course of at least six months, and no better explanation in a mood disorder, a substance or a medical condition. [apa-2022-dsm5tr]
How common is each?
Psychotic experiences are common, psychotic disorders are less so, and schizophrenia is the least common of the three. Across 18 countries, 5.8 percent of adults reported at least one psychotic experience in their lives, hallucinations (5.2 percent) far more often than delusional beliefs (1.3 percent), and about a third of them reported it only once. [mcgrath-2015-psychotic] The Finnish study counted disorders rather than experiences and found 3.06 percent with any psychotic disorder and 0.87 percent with schizophrenia. [perala-2007-prevalence]
| What is counted | Lifetime share of people studied | Where the figure comes from |
|---|---|---|
| Any psychotic experience | 5.8 percent | 18-country survey, McGrath (2015) |
| Any psychotic disorder | 3.06 percent | Finnish study, Perälä (2007) |
| Schizophrenia | 0.87 percent | Finnish study, Perälä (2007) |
By the two Finnish figures, schizophrenia accounts for a little over a quarter of all psychotic disorders. The three numbers come from different studies, countries and methods, so they show the shape of the picture rather than an exact ratio. A single experience is not an illness in itself, and our guide to hearing voices explains why.
What else causes psychosis?
Psychosis has many causes besides schizophrenia, and the cause decides what helps.
- Bipolar disorder. A meta-analysis of studies of adults with bipolar disorder found that 63 percent of people with bipolar I had experienced psychotic symptoms at some point, against 22 percent of people with bipolar II. [aminoff-2022-bipolar] For many people with bipolar I, psychosis is part of the mood illness. Our bipolar disorder guide covers that condition.
- Severe depression and childbirth. Depression can come with psychotic features, and psychosis can follow childbirth.
- Substances and medicines. Cannabis, stimulants, some prescribed drugs and withdrawal can all produce it. Our guide to whether cannabis causes psychosis covers the strongest evidence.
- Physical illness. Certain infections, autoimmune conditions and brain injuries can cause psychosis.
- Severe sleep loss. Days without enough sleep can produce psychotic symptoms in people with no other illness.
This is why a first episode is investigated before it is labelled. A mood disorder is treated as a mood disorder, a substance effect can settle once the substance has cleared, and a physical cause is treated at its source.
How do doctors tell them apart?
They work through the timeline, the other symptoms and a set of exclusions, and the timeline alone means a first episode usually cannot be called schizophrenia straight away. The DSM-5-TR sets minimum durations that separate the labels. [apa-2022-dsm5tr]
| Label | Symptom duration | Other requirement |
|---|---|---|
| Brief psychotic disorder | One day to under one month | Ends with a full return to previous functioning |
| Schizophreniform disorder | One month to under six months | Same symptom pattern as schizophrenia, shorter course |
| Schizophrenia | At least six months, counting early and lingering signs | Also needs a clear drop in everyday functioning |
Doctors also ask whether the psychosis appears only during mood episodes, which points to a mood disorder, whether it began after a substance or a medicine, and whether a physical cause has been ruled out. Where psychosis continues for at least two weeks without a major mood episode, but mood episodes also occur, the diagnosis is schizoaffective disorder, which sits between the two groups.
Does the first label stick?
It depends on the label: a first-episode diagnosis of schizophrenia stays the same about nine times in ten, while provisional labels usually change. A meta-analysis of 42 studies and 14,484 people with a first episode, followed for 4.5 years on average, measured how often the diagnosis was still the same at follow-up. It was 0.90 for schizophrenia and 0.84 for affective psychoses (psychosis within a mood disorder), against 0.36 for psychosis not otherwise specified and 0.29 for schizophreniform disorder. [fusar-poli-2016-stability] When the unstable labels changed, it was mainly to schizophrenia or to a mood disorder, which fits what they are: holding names for an episode that has not yet shown which way it is going.
Left view: share of people whose diagnosis was unchanged at follow-up, Fusar-Poli and colleagues (2016). Right view: pooled remission and recovery after a first episode, Lally and colleagues (2017), across all diagnoses.
Two things follow. Being told that the psychosis is clear but its cause is not yet known is an accurate answer, not an evasion. And a diagnosis of schizophrenia given early should be taken seriously as a working diagnosis, because it holds in most cases, while a provisional label is expected to be revisited as the picture clears.
What does the label mean for recovery?
Outcomes after a first episode are better than the stereotype suggests, and they describe the group more than any one diagnosis. A meta-analysis of long-term studies of first-episode psychosis found that 58 percent of people were in remission (average follow-up 5.5 years) and 38 percent had recovered (average follow-up 7.2 years). [lally-2017-remission] Remission means symptoms have settled. Recovery is a stricter standard that generally also counts everyday functioning.
Those studies pooled every diagnosis, so they cannot say how any one label fares, and they also mean that a substantial share of people continue to have difficulties, which is why support after the first episode matters. Our psychosis guide covers the evidence that the delay before treatment is the most changeable influence on outcome.
When to seek help
Ask a doctor for an assessment promptly if you or someone you know has hallucinations, fixed beliefs that others find alarming, or speech that is increasingly hard to follow, and do not wait for a label first. Assessment comes before diagnosis: it checks for physical causes, substances and medicines as well as for psychiatric ones, and it is the step that decides what treatment fits. Ask about early intervention services, which exist in many places for exactly this. Our guide to the early signs of psychosis covers what the build-up often looks like.
If you or someone else is at immediate risk, contact your local emergency services or a crisis helpline.
How MyFreud can help
A diagnosis depends on a timeline, and a timeline is hard to rebuild from memory. A dated record of sleep, mood and when unusual experiences began gives a clinician the thing the six-month and one-month thresholds are measuring, and it is much easier to bring to an appointment than to recall.
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