Schizophrenia (Lifetime prevalence about 0.3% - 0.7%)

• Two or more of the following for at least 1 month: hallucinations, delusions, disorganized speech, grossly disorganized or catatonic behavior, negative symptoms.
• Impairment in one or more areas of function (social, occupational, educational self-care) for a significant period of time since the onset of the illness.
• Continuous signs of the illness for at least 6 months (this can include prodromal or residual symptoms, which are attenuated forms of the symptoms described above

Schizophreniform Disorder (Lifetime prevalence similar to Schizophrenia)

• The same symptoms of schizophrenia described above that are present for at least 1 month but less than 6 months.

Schizoaffective Disorder (Lifetime prevalence about 0.3%)

• A period of illness where the person has both the psychotic symptoms necessary to meet criteria for schizophrenia and either a major depression or manic episode.

• The person experiences either delusions or hallucinations for at least 2 weeks when they are not having a depressive or manic episode.

• The symptoms that meet criteria for depressive or manic episodes are present for over half of the illness

Delusional Disorder (Lifetime prevalence about 0.2%)

• The presence of at least one delusion for at least a month.
• The person has never met criteria for schizophrenia.
• The person's function is not impaired outside the specific impact of the delusion.
• The duration of any depressive or manic episodes have been brief relative to the duration of the delusion.

Brief Psychotic Disorder (Lifetime prevalence unclear)

• One or more of the following symptoms present for at least 1 day but less than 1 month: delusions, hallucinations, disorganized speech, grossly disordered or catatonic behaviour.

Attenuated Psychotic Disorder (Lifetime prevalence unclear)

• One or more of the following symptoms in an "attenuated" form: delusions, hallucinations, or disorganized speech.
• The symptoms must have occurred at least once a week for the past month and must have started or gotten worse in the past year.
• The symptoms must be severe enough to distress or disable the individual or to suggest to others that the person needs clinical help.
• The person has never met the diagnostic criteria for a psychotic disorder, and the symptoms are not better attributed to another disorder, to substance use, or to a medical condition.

Generalized anxiety disorder (GAD)

• Excessive worry about everyday things that is at a level that is out of proportion to the specific causes of worry.

Internal bodily or somatic cues

• Physical sensations that serve as triggers for anxiety or as reminders of past traumatic events.

Interoceptive avoidance

• Avoidance of situations or activities that produce sensations of physical arousal similar to those occurring during a panic attack or intense fear response.

Obsessive-compulsive disorder (OCD)

• A disorder characterized by the desire to engage in certain behaviors excessively or compulsively in hopes of reducing anxiety. Behaviors include things such as cleaning, repeatedly opening and closing doors, hoarding, and obsessing over certain thoughts.

Panic disorder (PD)

• A condition marked by regular strong panic attacks, and which may include significant levels of worry about future attacks.

Posttraumatic stress disorder (PTSD)

• A sense of intense fear, triggered by memories of a past traumatic event, that another traumatic event might occur. PTSD may include feelings of isolation and emotional numbing.