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SCHIZOPHRENIA (Differential Diagnoses (Psychotic Mood Disorder
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SCHIZOPHRENIA
Epidemiology
- Lifetime prevalence: .5-1% universally, found in all cultures globally & historically, strong genetic basis
- Gender ratio: 1:1, though genders have slightly different presentations & vulnerability factors
- Age of onset: early 20s (20-29), prodromal symptoms present in adolescents
- Chronic course with marked functional impairment, though in other countries, seems to be more relapsing/remitting course
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Differential Diagnoses
Psychotic Mood Disorder
- less likely to have disorganized thoughts/behaviours
- excessive guilt may get to point of being delusional
- temporal aspect - do symptoms improve when mood improves?
- key feature is the mood disorder
Schizoaffective Disorder
- has major mood symptomatology
- will experience SZ symptoms in absence of mood features
- differentiated by prominent mood episodes that occur for majority of illness
Cluster A Personality Disorder
- can be hard to distinguish from prodrome
- not as much functional impairment
- subthreshold psychotic symptoms
- risk factor for developing SZ (like how OCPD is a risk factor for developing OCD)
Delusional Disorder
- only have delusions (thinking is intact, no hallucinations)
- if have hallucinations, they are not prominent
Brief Psychotic Disorder
- may meet criteria for SZ but for less than 1 month
- symptoms resolve on their own
- can be in response to a severe trauma or stressor
- very common, much more than SZ
- tends to not have same prodrome
Schizophreniform Disorder
- meet symptom criteria for SZ but gets better within 6 months
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