Gap finder

Search review questions

Each row is one question a systematic review asked: who, what, compared with what, and which outcome, with the effect it found and how certain that is. Words match anywhere in the field.

Limit to evidence status or GRADE (optional)

2,589 questions in 168 reviews · Schizophrenia

current versions
No studies 601 · 23.2%Ungraded 446 · 17.2%Very low 721 · 27.8%Low 505 · 19.5%Moderate 274 · 10.6%High 42 · 1.6%

Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.

QuestionEffectEvidenceStatus / GRADE
Summary of findings table ‐ Collaborative care vs usual care
Quality of life: average change in mental health component (proxy for binary quality of life) · severe mental illness
Collaborative care approaches for people with severe mental illness (2024) · Cochrane
no estimate extracted3 studies · 227 participantsVery low
Summary of findings table ‐ Collaborative care vs usual care
Mental state: clinically important change (binary) · severe mental illness
Collaborative care approaches for people with severe mental illness (2024) · Cochrane
RR 0.99 [0.77, 1.28]1 study · 253 participantsLow
Summary of findings table ‐ Collaborative care vs usual care
Psychiatric hospital admissions · severe mental illness
Collaborative care approaches for people with severe mental illness (2024) · Cochrane
RR 5.15 [0.67, 39.57]1 study · 253 participantsLow
Summary of findings table ‐ Collaborative care vs usual care
Quality of life: average change in physical health component (proxy for physical health) · severe mental illness
Collaborative care approaches for people with severe mental illness (2024) · Cochrane
no estimate extracted3 studies · 237 participantsVery low
Summary of findings table ‐ Collaborative care vs usual care
Disability (proxy for social functioning) · severe mental illness
Collaborative care approaches for people with severe mental illness (2024) · Cochrane
RR 1.38 [0.97, 1.95]1 study · 253 participantsLow
Summary of findings table ‐ Collaborative care vs usual care
Personal recovery ‐ not reported · severe mental illness
Collaborative care approaches for people with severe mental illness (2024) · Cochrane
no estimate extractedNRNo studies
Summary of findings table ‐ Collaborative care vs usual care
Experience of care/satisfaction ‐ not reported · severe mental illness
Collaborative care approaches for people with severe mental illness (2024) · Cochrane
no estimate extractedNRNo studies
Structured risk assessment vs standard professional care
Scientific behaviour: aggression – clinically important change in aggressive/violent behaviour, as defined by the individual studies · aggressive behaviour in schizophrenia
Risk assessment for aggressive behaviour in schizophrenia (2024) · Cochrane
RR 0.59 [0.41, 0.85]1 study · 1852 participantsModerate
Structured risk assessment vs standard professional care
Use of coercive measure: use of seclusion room (time, days) · aggressive behaviour in schizophrenia
Risk assessment for aggressive behaviour in schizophrenia (2024) · Cochrane
RR 0.92 [0.27, 3.07]1 study · 20 participantsLow
Structured risk assessment vs standard professional care
Use of coercive measure: use of seclusion room (participants) · aggressive behaviour in schizophrenia
Risk assessment for aggressive behaviour in schizophrenia (2024) · Cochrane
RR 1.83 [0.39, 8.7]1 study · 20 participantsLow
Structured risk assessment vs standard professional care
Use of coercive measure: use of seclusion room (incidents) · aggressive behaviour in schizophrenia
Risk assessment for aggressive behaviour in schizophrenia (2024) · Cochrane
RR 1.63 [0.49, 5.47]1 study · 20 participantsLow
Structured risk assessment vs standard professional care
Adverse effects (escape) · aggressive behaviour in schizophrenia
Risk assessment for aggressive behaviour in schizophrenia (2024) · Cochrane
RR 0.2 [0.01, 4.11]1 study · 200 participantsVery low
Structured risk assessment vs standard professional care
Adverse effects (fall down) · aggressive behaviour in schizophrenia
Risk assessment for aggressive behaviour in schizophrenia (2024) · Cochrane
RR 0.33 [0.04, 3.15]1 study · 200 participantsVery low
Structured risk assessment vs standard professional care
Adverse effects (choking) · aggressive behaviour in schizophrenia
Risk assessment for aggressive behaviour in schizophrenia (2024) · Cochrane
RR 0.2 [0.01, 4.11]1 study · 200 participantsVery low
Summary of findings table ‐ Cognitive behavioural therapy plus standard care vs control
Mental state ‐ general: mean endpoint overall symptom scales (high = poor) (combined time points) · first‐episode or recent‐onset psychosis
Cognitive behavioural therapy added to standard care for first‐episode and recent‐onset psychosis (2024) · Cochrane
no estimate extracted20 studies · 1508 participantsLow
Summary of findings table ‐ Cognitive behavioural therapy plus standard care vs control
Global state ‐ number of participants with relapse/exacerbations of psychosis (combined time points) · first‐episode or recent‐onset psychosis
Cognitive behavioural therapy added to standard care for first‐episode and recent‐onset psychosis (2024) · Cochrane
RR 0.82 [0.57, 1.18]7 studies · 693 participantsLow
Summary of findings table ‐ Cognitive behavioural therapy plus standard care vs control
Leaving the study early ‐ for any reason ‐ overall acceptability (combined time points) · first‐episode or recent‐onset psychosis
Cognitive behavioural therapy added to standard care for first‐episode and recent‐onset psychosis (2024) · Cochrane
RR 0.87 [0.72, 1.05]25 studies · 2242 participantsModerate
Summary of findings table ‐ Cognitive behavioural therapy plus standard care vs control
Functioning ‐ mean endpoint functioning scale (high = good) (combined time points) · first‐episode or recent‐onset psychosis
Cognitive behavioural therapy added to standard care for first‐episode and recent‐onset psychosis (2024) · Cochrane
no estimate extracted18 studies · 1241 participantsModerate
Summary of findings table ‐ Cognitive behavioural therapy plus standard care vs control
Adverse events ‐ participants with at least one adverse event ‐ < 12 months · first‐episode or recent‐onset psychosis
Cognitive behavioural therapy added to standard care for first‐episode and recent‐onset psychosis (2024) · Cochrane
RR 1.29 [0.85, 1.97]1 study · 43 participantsVery low
Summary of findings table ‐ CBT without antipsychotics vs no specific treatment
Mental state ‐ general: mean endpoint PANSS total (high = poor) ‐ < 12 months · schizophrenia
Cognitive behavioural therapy without medication for schizophrenia (2024) · Cochrane
no estimate extracted1 study · 39 participantsLow
Summary of findings table ‐ CBT without antipsychotics vs antipsychotics
Adverse events ‐ Participants with at least one AE (separated time points) ‐ < 12 months · schizophrenia
Cognitive behavioural therapy without medication for schizophrenia (2024) · Cochrane
RR 0.47 [0.21, 1.07]1 study · 40 participantsVery low
Summary of findings table ‐ CBT without antipsychotics vs CBT plus antipsychotics
Mental state ‐ general: mean endpoint overall symptoms scales (PANSS/BPRS) (high = poor) (separated time points) ‐ < 12 months · schizophrenia
Cognitive behavioural therapy without medication for schizophrenia (2024) · Cochrane
no estimate extracted3 studies · 125 participantsVery low
Summary of findings table ‐ CBT without antipsychotics vs CBT plus antipsychotics
Global state ‐ number of participants with relapse/exacerbations of psychosis (separated time points) ‐ < 12 months · schizophrenia
Cognitive behavioural therapy without medication for schizophrenia (2024) · Cochrane
RR 2.89 [0.12, 67.75]1 study · 90 participantsVery low
Summary of findings table ‐ CBT without antipsychotics vs CBT plus antipsychotics
Leaving the study early ‐ for any reason ‐ overall acceptability (separated time points) ‐ < 12 months · schizophrenia
Cognitive behavioural therapy without medication for schizophrenia (2024) · Cochrane
RR 0.7 [0.12, 4.11]2 studies · 90 participantsVery low
Summary of findings table ‐ CBT without antipsychotics vs CBT plus antipsychotics
Functioning ‐ mean endpoint functioning scales (high = good) ‐ < 12 months · schizophrenia
Cognitive behavioural therapy without medication for schizophrenia (2024) · Cochrane
no estimate extracted3 studies · 110 participantsVery low
Summary of findings table ‐ CBT without antipsychotics vs CBT plus antipsychotics
Adverse events ‐ Participants with at least one AE (separated time points) ‐ < 12 months · schizophrenia
Cognitive behavioural therapy without medication for schizophrenia (2024) · Cochrane
RR 0.36 [0.17, 0.8]1 study · 39 participantsLow
Summary of findings table ‐ CBT without antipsychotics vs no specific treatment
Global state ‐ number of participants with relapse/exacerbations of psychosis (separated time points) ‐ > 1 year · schizophrenia
Cognitive behavioural therapy without medication for schizophrenia (2024) · Cochrane
RR 0.5 [0.05, 5.28]1 study · 74 participantsLow
Summary of findings table ‐ CBT without antipsychotics vs no specific treatment
Leaving the study early ‐ for any reason ‐ overall acceptability (separated time points) ‐ < 12 months · schizophrenia
Cognitive behavioural therapy without medication for schizophrenia (2024) · Cochrane
RR 0.8 [0.23, 2.75]1 study · 74 participantsLow
Summary of findings table ‐ CBT without antipsychotics vs no specific treatment
Functioning ‐ mean endpoint PSP (high = good) ‐ < 12 months · schizophrenia
Cognitive behavioural therapy without medication for schizophrenia (2024) · Cochrane
no estimate extracted1 study · 40 participantsLow
Summary of findings table ‐ CBT without antipsychotics vs no specific treatment
Adverse events ‐ Participants with at least one AE ‐ > 1 year · schizophrenia
Cognitive behavioural therapy without medication for schizophrenia (2024) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Summary of findings table ‐ CBT without antipsychotics vs antipsychotics
Mental state ‐ general: mean endpoint PANSS total (high = poor) ‐ < 12 months · schizophrenia
Cognitive behavioural therapy without medication for schizophrenia (2024) · Cochrane
no estimate extracted2 studies · 63 participantsVery low
Summary of findings table ‐ CBT without antipsychotics vs antipsychotics
Global state ‐ number of participants with relapse/exacerbations of psychosis (separated time points) ‐ < 12 months · schizophrenia
Cognitive behavioural therapy without medication for schizophrenia (2024) · Cochrane
RR 2.78 [0.12, 65.08]1 study · 90 participantsVery low
Summary of findings table ‐ CBT without antipsychotics vs antipsychotics
Leaving the study early ‐ for any reason ‐ overall acceptability (separated time points) ‐ < 12 months · schizophrenia
Cognitive behavioural therapy without medication for schizophrenia (2024) · Cochrane
RR 1.66 [0.21, 12.94]2 studies · 90 participantsVery low
Summary of findings table ‐ CBT without antipsychotics vs antipsychotics
Functioning ‐ mean endpoint functioning scales (high = good) ‐ < 12 months · schizophrenia
Cognitive behavioural therapy without medication for schizophrenia (2024) · Cochrane
no estimate extracted2 studies · 46 participantsVery low
Magnetic seizure therapy plus standard care vs electroconvulsive therapy plus standard care
Global state: clinically important change assessed by: number of participants with a clinical responseStudy duration: 4 weeks · people with acute schizophrenia
Magnetic seizure therapy for people with schizophrenia (2023) · Cochrane
RR 1.12 [0.73, 1.7]1 study · 79 participantsVery low
Magnetic seizure therapy plus standard care vs electroconvulsive therapy plus standard care
Cognitive functioning: clinically important change ‐ not measured · people with acute schizophrenia
Magnetic seizure therapy for people with schizophrenia (2023) · Cochrane
no estimate extractedNRNo studies
Magnetic seizure therapy plus standard care vs electroconvulsive therapy plus standard care
Adverse effects: clinically important adverse effectsassessed by: number of participants with a delayed memory deficitStudy duration: 4 weeks · people with acute schizophrenia
Magnetic seizure therapy for people with schizophrenia (2023) · Cochrane
RR 0.63 [0.41, 0.96]1 study · 79 participantsVery low
Magnetic seizure therapy plus standard care vs electroconvulsive therapy plus standard care
Quality of life: clinically important change ‐ not measured · people with acute schizophrenia
Magnetic seizure therapy for people with schizophrenia (2023) · Cochrane
no estimate extractedNRNo studies
Magnetic seizure therapy plus standard care vs electroconvulsive therapy plus standard care
Social functioning: clinically important change ‐ not measured · people with acute schizophrenia
Magnetic seizure therapy for people with schizophrenia (2023) · Cochrane
no estimate extractedNRNo studies
Magnetic seizure therapy plus standard care vs electroconvulsive therapy plus standard care
Leaving the study early: any reasonassessed by: number of dropouts for any reason Study duration: 4 weeks · people with acute schizophrenia
Magnetic seizure therapy for people with schizophrenia (2023) · Cochrane
RR 2.51 [0.73, 8.59]1 study · 79 participantsVery low
CBT plus standard care vs standard care
Aggression ‐ frequency of physical violence. · persistent aggressive behaviour or agitation in people with schizophrenia
Cognitive behavioural therapy plus standard care versus standard care for persistent aggressive behaviour or… (2023) · Cochrane
no estimate extracted1 study · 84 participantsVery low
CBT plus standard care vs standard care
Agitation ‐ frequency of agitation · persistent aggressive behaviour or agitation in people with schizophrenia
Cognitive behavioural therapy plus standard care versus standard care for persistent aggressive behaviour or… (2023) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
CBT plus standard care vs standard care
Clinically important adverse effect or event. · persistent aggressive behaviour or agitation in people with schizophrenia
Cognitive behavioural therapy plus standard care versus standard care for persistent aggressive behaviour or… (2023) · Cochrane
no estimate extracted1 study · 100 participantsUngraded
CBT plus standard care vs standard care
Self harm ‐ frequency of self harm · persistent aggressive behaviour or agitation in people with schizophrenia
Cognitive behavioural therapy plus standard care versus standard care for persistent aggressive behaviour or… (2023) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
CBT plus standard care vs standard care
Mental state ‐ clinically important change in mental state · persistent aggressive behaviour or agitation in people with schizophrenia
Cognitive behavioural therapy plus standard care versus standard care for persistent aggressive behaviour or… (2023) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
CBT plus standard care vs standard care
Leaving the study early for any reason. · persistent aggressive behaviour or agitation in people with schizophrenia
Cognitive behavioural therapy plus standard care versus standard care for persistent aggressive behaviour or… (2023) · Cochrane
no estimate extracted2 studies · 184 participantsLow
CBT plus standard care vs standard care
Quality of life ‐ clinically important change in overall quality of life · persistent aggressive behaviour or agitation in people with schizophrenia
Cognitive behavioural therapy plus standard care versus standard care for persistent aggressive behaviour or… (2023) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
Group cognitive behavioural therapy for psychosis vs standard care
Clinically important change, shown as improved – as defined by individual studies · people with schizophrenia
Cognitive behavioural therapy (group) for schizophrenia (2022) · Cochrane
no estimate extractedNRNo studies
Group cognitive behavioural therapy for psychosis vs standard care
Relapse · people with schizophrenia
Cognitive behavioural therapy (group) for schizophrenia (2022) · Cochrane
no estimate extractedNRNo studies
Group cognitive behavioural therapy for psychosis vs standard care
Leaving the study early: for any reason – end of treatment · people with schizophrenia
Cognitive behavioural therapy (group) for schizophrenia (2022) · Cochrane
RR 1.22 [0.94, 1.59]13 studies · 1267 participantsLow