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
Glycerol laxative vs acupuncture
(c) Change in straining at defecation · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Glycerol laxative vs acupuncture
(d) Change in the frequency of lumpy or hard stools · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Glycerol laxative vs acupuncture
(e) Change in the frequency of manual manoeuvres to facilitate defecation · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Glycerol laxative vs acupuncture
Need for rescue medication · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Glycerol laxative vs tuina massage
Global or clinical change in constipation (a) as defined by the study Still constipated (no defecation) at 3 days · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
RR 4.8 [1.96, 11.74]1 study · 120 participantsVery low
Glycerol laxative vs acupuncture
Presence of antipsychotic‐related constipation complications such as bowel obstruction · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Glycerol laxative vs acupuncture
Quality of life (changed to any extent) · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Glycerol laxative vs acupuncture
Adverse events · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Glycerol laxative vs acupuncture
Leaving the study early · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Glycerol laxative vs acupuncture
Economic costs · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Mannitol vs phenolphthalein or rhubarb soda
Global or clinical change in constipation as defined by the study a) Still constipated (no defecation) at 24 hours · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
RR 0.07 [0.02, 0.27]1 study · 240 participantsVery low
Mannitol vs phenolphthalein or rhubarb soda
(b) Change in the frequency of defecation · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Mannitol vs phenolphthalein or rhubarb soda
(c) Change in straining at defecation · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Mannitol vs phenolphthalein or rhubarb soda
(d) Change in the frequency of lumpy or hard stools · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Mannitol vs phenolphthalein or rhubarb soda
(e) Change in the frequency of manual manoeuvres to facilitate defecation · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Glycerol laxative vs tuina massage
(b) Change in the frequency of defecation · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Mannitol vs phenolphthalein or rhubarb soda
Need for rescue medication · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Mannitol vs phenolphthalein or rhubarb soda
Presence of antipsychotic‐related constipation complications such as bowel obstruction · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Mannitol vs phenolphthalein or rhubarb soda
Quality of life (changed to any extent) · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Mannitol vs phenolphthalein or rhubarb soda
Adverse events · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extracted1 study · 240 participantsUngraded
Mannitol vs phenolphthalein or rhubarb soda
Leaving the study early · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Mannitol vs phenolphthalein or rhubarb soda
Economic costs · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Glycerol laxative vs tuina massage
(c) Change in straining at defecation · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Glycerol laxative vs tuina massage
(d) Change in the frequency of lumpy or hard stools · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Glycerol laxative vs tuina massage
(e) Change in the frequency of manual manoeuvres to facilitate defecation · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Glycerol laxative vs tuina massage
Need for rescue medication · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Glycerol laxative vs tuina massage
Presence of antipsychotic‐related constipation complications such as bowel obstruction · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Glycerol laxative vs tuina massage
Quality of life (changed to any extent) · antipsychotic‐related constipation
Pharmacological treatment for antipsychotic‐related constipation (2017) · Cochrane
no estimate extractedNRNo studies
Individual TF‐CBT vs waiting list/usual care
PTSD symptoms: Clinician‐rated PTSD symptom severity ‐ average endpoint CAPS total score (high = poor) ‐ short term (6 months) · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extracted1 study · 13 participantsLow
EMDR vs waiting list/usual care
Symptoms of co‐morbid psychosis: 1. Overall mental state · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extractedNRNo studies
EMDR vs waiting list/usual care
Anxiety symptoms · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extractedNRNo studies
EMDR vs waiting list/usual care
Depressive symptoms · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extractedNRNo studies
EMDR vs waiting list/usual care
Adverse events ‐ incidents of unspecified severe adverse events ‐ medium term · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extracted1 study · 102 participantsLow
EMDR vs waiting list/usual care
Health economics · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extractedNRNo studies
Individual TF‐CBT vs EMDR
PTSD symptom severity: 1. Clinician‐rated severity ‐ average endpoint CAPS total score (high = poor) ‐ Medium term ‐ skewed data · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extracted1 study · 88 participantsVery low
Individual TF‐CBT vs EMDR
Quality of life: 1. General quality of life · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extractedNRNo studies
Individual TF‐CBT vs EMDR
Symptoms of co‐morbid psychosis: 1. Overall mental state · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extractedNRNo studies
Individual TF‐CBT vs EMDR
Anxiety symptoms · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extractedNRNo studies
Individual TF‐CBT vs EMDR
Depressive symptoms · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extractedNRNo studies
Individual TF‐CBT vs waiting list/usual care
Quality of life: 1. General quality of life ‐ average endpoint QLS total score (high = good) ‐ medium term · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extracted1 study · 39 participantsLow
Individual TF‐CBT vs EMDR
Adverse events ‐ incidents of unspecified severe events ‐ medium term · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extractedNRNo studies
Individual TF‐CBT vs EMDR
Health economics · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extractedNRNo studies
Individual TF‐CBT vs Brief PTSD psychoeducation
PTSD symptom severity: 1. Clinician‐rated PTSD severity ‐ average endpoint CAPS total score (high = poor) ‐ Medium term · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extracted1 study · 52 participantsLow
Individual TF‐CBT vs Brief PTSD psychoeducation
Quality of life: 1. General quality of life ‐ average endpoint QoLI total score (high = good) ‐ Long term · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extracted1 study · 49 participantsLow
Individual TF‐CBT vs Brief PTSD psychoeducation
Symptoms of co‐morbid psychosis: 1. Overall mental state · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extractedNRNo studies
Individual TF‐CBT vs Brief PTSD psychoeducation
Anxiety symptoms · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extractedNRNo studies
Individual TF‐CBT vs Brief PTSD psychoeducation
Depressive symptoms · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extractedNRNo studies
Individual TF‐CBT vs Brief PTSD psychoeducation
Adverse events ‐ incidents of unspecified severe adverse events · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extractedNRNo studies
Individual TF‐CBT vs Brief PTSD psychoeducation
Health economics · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extractedNRNo studies
Individual TF‐CBT vs waiting list/usual care
Symptoms of co‐morbid psychosis: 1. Overall mental state ‐ average endpoint BPRS total score (high = poor) ‐ medium term · Adults with co‐morbid PTSD and SMI
Psychological interventions for post‐traumatic stress disorder (PTSD) in people with severe mental illness (2017) · Cochrane
no estimate extracted1 study · 9 participantsLow