Schizophrenia and psychotic disorders Flashcards
Environmental risk factors for developing schizophrenia
Urban living
Being a migrant
Winter/spring birth
Male:female incidence of schizophrenia
1.4:1
Point prevalence of schizophrenia
4.6/1000
Lifetime risk of schizophrenia
0.7%
Differences in schizophrenia epidemiology in developing countries
Lower rates overall
Higher comparative rates of catatonia
Lower comparative rates of hebephrenic schizophrenia
Percentage of patients with schizophrenia who have catatonia in developed countries
1%
Percentage of patients with schizophrenia who have catatonia in developing countries
10%
Percentage of patients with schizophrenia who have hebephrenia in developed countries
13%
Percentage of patients with schizophrenia who have hebephrenia in developing countries
4%
Percentage of apparently healthy people who report experiencing hallucinations
4.2%
Percentage of apparently people who report hearing voices saying ‘quite a few words’ when there was nobody around to account for it
0.7%
Average age of onset of delusional disorders
39
OR of schizophrenia with associated cannabis use
2.1
Figures who identified that patients with schizophrenia in high expressed emotion families were more likely to experience a relapse
Brown and Rutter
Risk of relapse within a year for patients with schizophrenia in high expressed emotion families without family therapy
64%
Risk of relapse within a year for patients with schizophrenia in high expressed emotion families after family therapy
24%
Three forms of social skills training for patients with schizohprenia
Basic model
Problem solving model
Cognitive remediation model
Description of the basic model of social skills training
Complex social repertoires are broken down into smaller steps, learned, practiced, and then applied to natural settings
Description of the social problem solving model of social skills training
Suggests that deficits in information processing are the cause of deficits in social skills
Aims to improve impairments in information processing
Targets medication and symptom management, recreation, basic conversation, and self care
Description of the cognitive remediation model of social skills training
Targets fundamental cognitive skills such as attention and planning
Suggests that improvements in fundamental skills will transfer to more complex processes
Percentage of patients with a first episode of psychosis who relapse within a year despite antipsychotic treatment
27%
Percentage of patients with a first episode of psychosis who relapse within a year with placebo treatment
61%
Percentage of all patients with psychosis who relapse within one year despite antipsychotic treatment
40%
Percentage of patients with psychosis who live in a stressful situation who relapse within one year despite antipsychotic treatment
62%
Lifetime suicide risk among patients with schizophrenia
5.6%
Subtypes of schizophrenia with the best prognosis
Catatonic
Paranoid
Subtype of schizophrenia with the worse prognosis
Hebephrenic
Positive prognostic factors in schizophrenia
Late onset
Clear precipitating factors
Acute onset
Good premorbid functioning
Affective symptoms
Being married
Family history of affective disorders
Positive symptoms only
Good initial treatment response
Female sex
Most important positive prognostic factor in schizophrenia
Good initial treatment response
Poor prognostic factors in schizophrenia
Early onset
Insidious onset
No clear precipitating factors
Social withdrawal
Being single, divorced, or widowed
Poor social support
High expressed emotion families
Negative symptoms
Poor treatment compliance
No remisson in 3 years
Many relapses
Perinatal trauma history
History of violence
Best predictors of a poor prognosis following a psychotic episode
Stressful life events
High expressed emotion families
Non-compliance with treatment
Drug which shows a moderate to large improvement over first generation antipsychotics in studies
Clozapine
Drugs which show a small to moderate improvement over first generation antipsychotics in studies
Olanzapine
Risperidone
Near maximal effective dose for aripiprazole
10mg/day
Near maximal effective dose for haloperidol
3.3-10mg/day
Near maximal effective dose for clozapine
> 400mg/day
Near maximal effective dose for olanzapine
> 16mg/day
Near maximal effective dose for risperidone
4mg/day
Findings in CATIE trial for staying with the same medication or switching when patients require a treatment review
Patients who stayed on the same medication did better, especially for olanzapine
Description of primary negative symptoms of schizophrenia
Negative symptoms that are intrinsic to schizophrenia
Description of secondary negative symptoms of schizophrenia
Negative symptoms that occur as a result of positive symptoms, treatment side effects, environmental deprivation etc.
Six features of deficit schizophrenia
Restricted affect
Diminished emotional range
Poverty of speech
Curbing of interest
Diminished sense of purpose
Diminished social drive
Number of features which must be present for a diagnosis of deficit schizophrenia
Two
Best studied second generation antipsychotic for negative symptoms
Amisulpride
Partial agonist at the glycine modulatory site of the glutamatergic NMDA receptor which has been investigated as an add on treatment for negative symptoms in schizophrenia
D-cycloserine
Antipsychotic shown to decrease suicidality among patients with schizophrenia better than olanzapine
Clozapine
First line treatment for patients with newly diagnosed schizophrenia
Oral atypical antipsychotic
Number of antipsychotics which should be tried at an adequate dose before trying clozapine
Two, with at least one atypical
Percentage of patients with schizophrenia who will have a relapse of a psychotic episode within a year despite treatment
20%
Percentage of patients with schizophrenia who will have a relapse of a psychotic episode within a year if they are not given treament
60%
Length of maintenance antipsychotic therapy usually suggested after a psychotic episode
At least 1-2 years
Antipsychotics to avoid if EPSEs are an issue
Typical antipsychotics, especially risperidone
Antipsychotics to avoid if metabolic syndrome is an issue
Olanzapine
Clozapine
Antipsychotics to try if metabolic syndrome is an issue
Amisulpride
Aripiprazole
Antipsychotic to avoid if raised prolactin is an issue
Amisulpride
Antipsychotics to try if raised prolactin is an issue
Aripiprazole
Olanzapine
Quetiapine
Antipsychotics to try if over-sedation is an issue
Haloperidol
Aripiprazole
Amisulpride
Antipsychotics to try if sexual dysfunction is an issue
Aripiprazole
Quetiapine
Depot antipsychotic which may be the best for relapse prevention
Zuclopenthixol
Depot antipsychotic which has a particularly high EPSE burden
Zuclopenthixol
Depot antipsychotic which may also treat depression
Flupentixol
Depot antipsychotic which may be useful for prevention of mania
Haloperidol
Depot antipsychotic which shows lower rate of EPSEs
Pipotiazine
Depot antipsychotic which may cause depression
Fluphenazine
Depot antipsychotic which needs an aqueous suspension immediately before injection
Risperidone
Depot antipsychotic which does not require a test dose
Risperidone
Risk of NMS with depot compared to oral antipsychotics
Equal
Equivalent chlorpromazine dose which is considered high dose antipsychotic prescribing
1g/day
Percentage of patients with treatment resistant schizophrenia who respond to clozapine within 6 weeks
30%
Percentage of patients with treatment resistant schizophrenia who respond to high dose chlorpromazine
4%
Likely minimum clozapine plasma level required before someone is said to be a non-responder
350-450 ng/ml
Length of time antipsychotics should be tried for before clozapine is tried
6-8 weeks each
Antipsychotics studied in phase one of the CATIE trial
Olanzapine
Quetiapine
Risperidone
Ziprasidone (added later)
Perphenazine
Percentage of patients in the CATIE trial who discontinued treatment within 18 months
74%
Antipsychotic with the lowest discontinuation rate in the CATIE trial
Olanzapine
Antipsychotic with the highest discontinuation rate in the CATIE trial
Quetiapine
Antipsychotic which caused the most weight gain in the CATIE trial
Olanzapine
Antipsychotic studied in phase two of the CATIE trial
Clozapine
Antipsychotic with the lowest discontinuation rate in phase two of the CATIE trial
Clozapine
Antipsychotic with the highest rate of anticholinergic side effects
Clozapine
Comparisons made in the CATIE trial
Olanzapine, quetiapine, risperidone, ziprasidone, and perphenazine against each other in phase one
Clozapine against olanzapine, quetiapine, risperidone, and ziprasidone in phase two
Antipsychotic used in phase one of the CATIE study but not in phase two
Perphenazine
Blindedness of the CATIE study
Double blind
Antipsychotic added part way through the CATIE study
Ziprasidone
Antipsychotics compared in the CUtLASS study
First generation antipsychotics vs. second generation antipsychotics in the first phase
Clozapine vs. second generation antipsychotics in the second phase
Blindedness of the CUtLASS study
Unblinded
Primary outcome of the CUtLASS study
Quality of life at one year
Second generation antipsychotics studied in the CUtLASS study
Amisulpride
Olanzapine
Quetiapine
Risperidone
Findings of phase one of the CUtLASS trial
Slight advantage to first generation antipsychotics over second generation antipsychotics
Findings of phase two of the CUtLASS trial
Significant advantage to clozapine over second generation antipsychotics
Two antipsychotics shown to reduce suicidality among patients with schizophrenia
Olanzapine
Clozapine
Antidepressant which has shown to be effective among patients with body dysmorphic disorder
Fluoxetine
Most effective intervention for antipsychotic related weight gain
Lifestyle modifications
Most effective interventions to reduce waist circumference in schizophrenia
Aripiprazole augmentation
Topiramate
Most effective interventions to reduce glucose levels in schizophrenia
Switch antipsychotic to aripiprazole
Metformin
Most effective interventions to reduce insulin resistancein schizophrenia
Metformin
Rosiglitazone
Risk of tardive dyskinesia for depot antipsychotics compared with oral antipsychotics
Equal
Antipsychotics most associated with weight gain
Olanzapine
Clozapine
Antipsychotics least associated with weight gain
Asenapine
Amisulpride
Aripiprazole
Lurasidone
Ziprasidone
Haloperidol
Most effective antipsychotic at reducing suicidality
Clozapine
Dose of antipsychotic which should be used for a first episode of psychosis compared to in a patient with longstanding psychosis
Lower doses should be used for first episode psychosis
Effect of ketamine given to stable patients with schizophrenia
Transient relapse of psychosis
First generation antipsychotic used in the CATIE study
Perphenazine
NICE guidelines on switching from FGA to SGA
No routine switch needed if patient is responding and happy with current FGA
Antipsychotic with the best evidence for reducing aggression in patients with schizophrenia
Clozapine
Number of hours contact per week with a family member with high expressed emotions which increases the risk of relapse for a patient with schizophrenia
> 35
Psychosocial interventions with the best evidence for the management of schizophrenia
Vocational rehabilitation
CBT
Family therapy
Psychoeducation
Complications of pregnancy which increase risk of schizophrenia in the offspring
Bleeding
HTN
Pre-eclampsia
Diabetes
Rhesus incompatibility
Placental abruption
Premature rupture of membranes
Foetal abnormalities of growth/development which increase risk of schizophrenia later in life
Low birth weight
Prematurity
Congenital malformations
Small head circumference
Delivery complications which increase risk of schizophrenia in the offspring
Hypoxia
Uterine atony
Forceps delivery
EMCS
Resuscitation
Use of an incubator
Single most important factor which increases the risk of hospitalisation among mentally unwell patients
Treatment non-adherence
Positive components in the PANSS scale for schizophrenia
Delusions
Conceptual disorganisation
Hallucinations
Excitement
Grandiosity
Suspiciousness/persecution
Hostility