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)

1,554 questions in 140 reviews · Heart

current versions
No studies 272 · 17.5%Ungraded 44 · 2.8%Very low 329 · 21.2%Low 464 · 29.9%Moderate 319 · 20.5%High 126 · 8.1%

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
Nifurtimox vs placebo
Adverse events (N) · adults with both late‐stage, symptomatic Chagas disease and CCC
Trypanocidal drugs for late‐stage, symptomatic Chagas disease (Trypanosoma cruzi infection) (2020) · Cochrane
no estimate extractedNRNo studies
Benznidazole vs placebo
Clearance of parasitaemia demonstrated by negative xenodiagnosis, blood culture, and/or molecular assays (N) · adults with both late‐stage, symptomatic Chagas disease and CCC
Trypanocidal drugs for late‐stage, symptomatic Chagas disease (Trypanosoma cruzi infection) (2020) · Cochrane
OR 31.66 [10.56, 94.97]1 study · 50 participantsVery low
Benznidazole vs placebo
Pathological demonstration of tissue parasites (N) · adults with both late‐stage, symptomatic Chagas disease and CCC
Trypanocidal drugs for late‐stage, symptomatic Chagas disease (Trypanosoma cruzi infection) (2020) · Cochrane
no estimate extractedNRNo studies
Benznidazole vs placebo
Clinical improvement (N) (a) Heart failure (b) Sustained ventricular tachycardia · adults with both late‐stage, symptomatic Chagas disease and CCC
Trypanocidal drugs for late‐stage, symptomatic Chagas disease (Trypanosoma cruzi infection) (2020) · Cochrane
RR 0.89 [0.69, 1.14]1 study · 2854 participantsLow
Benznidazole vs placebo
Quality of life · adults with both late‐stage, symptomatic Chagas disease and CCC
Trypanocidal drugs for late‐stage, symptomatic Chagas disease (Trypanosoma cruzi infection) (2020) · Cochrane
no estimate extractedNRNo studies
Benznidazole vs placebo
Adverse events (N) · adults with both late‐stage, symptomatic Chagas disease and CCC
Trypanocidal drugs for late‐stage, symptomatic Chagas disease (Trypanosoma cruzi infection) (2020) · Cochrane
RR 2.52 [2.09, 3.03]1 study · 2854 participantsModerate
Nifurtimox vs placebo
Clearance or reduction of antibody titres (N) · adults with both late‐stage, symptomatic Chagas disease and CCC
Trypanocidal drugs for late‐stage, symptomatic Chagas disease (Trypanosoma cruzi infection) (2020) · Cochrane
RR 16.89 [2.44, 116.85]1 study · 51 participantsVery low
Nifurtimox vs placebo
Clearance of parasitaemia demonstrated by negative xenodiagnosis, blood culture, and/or molecular assays (N) · adults with both late‐stage, symptomatic Chagas disease and CCC
Trypanocidal drugs for late‐stage, symptomatic Chagas disease (Trypanosoma cruzi infection) (2020) · Cochrane
no estimate extractedNRNo studies
Nifurtimox vs placebo
Pathological demonstration of tissue parasites (N) · adults with both late‐stage, symptomatic Chagas disease and CCC
Trypanocidal drugs for late‐stage, symptomatic Chagas disease (Trypanosoma cruzi infection) (2020) · Cochrane
no estimate extractedNRNo studies
Intravenous immunoglobulin vs placebo or no treatment
Event‐free survival (risk of death, cardiac transplant, or left ventricular assist device) ‐ adults with myocarditis, median · adults with acute myocarditis
Intravenous immunoglobulin for presumed viral myocarditis in children and adults (2020) · Cochrane
RR 1.76 [0.48, 6.4]1 study · 62 participantsVery low
Intravenous immunoglobulin vs placebo or no treatment
Overall survival (risk of death) ‐ adults with myocarditis, median · adults with acute myocarditis
Intravenous immunoglobulin for presumed viral myocarditis in children and adults (2020) · Cochrane
RR 0.91 [0.23, 3.62]2 studies · 103 participantsVery low
Intravenous immunoglobulin vs placebo or no treatment
Side effects ‐ mild infusion effects, 12‐month · adults with acute myocarditis
Intravenous immunoglobulin for presumed viral myocarditis in children and adults (2020) · Cochrane
RR 20.29 [1.25, 329.93]1 study · 62 participantsVery low
Intravenous immunoglobulin vs placebo or no treatment
Overall survival (risk of death) ‐ children with myocarditis, 6‐month · children with acute myocarditis
Intravenous immunoglobulin for presumed viral myocarditis in children and adults (2020) · Cochrane
RR 0.48 [0.2, 1.15]1 study · 86 participantsVery low
Child‐feeding interventions vs no intervention
Child vegetable intake Short‐term impact (< 12 months) · children aged five years and under
Interventions for increasing fruit and vegetable consumption in children aged five years and under (2020) · Cochrane
no estimate extracted19 studies · 2140 participantsLow
Child nutrition education interventions vs no intervention
Child fruit and vegetable intake Short‐term impact (< 12 months) · children aged five years and under
Interventions for increasing fruit and vegetable consumption in children aged five years and under (2020) · Cochrane
no estimate extracted2 studies · 292 participantsLow
Child nutrition education interventions vs no intervention
Cost or cost effectiveness Not reported · children aged five years and under
Interventions for increasing fruit and vegetable consumption in children aged five years and under (2020) · Cochrane
no estimate extractedNRNo studies
Child nutrition education interventions vs no intervention
Unintended adverse events Not reported · children aged five years and under
Interventions for increasing fruit and vegetable consumption in children aged five years and under (2020) · Cochrane
no estimate extractedNRNo studies
Child‐feeding interventions vs no intervention
Cost effectiveness Short‐term impact (< 12 months) Not reported · children aged five years and under
Interventions for increasing fruit and vegetable consumption in children aged five years and under (2020) · Cochrane
no estimate extractedNRNo studies
Child‐feeding interventions vs no intervention
Unintended adverse events Short‐term impact (< 12 months) · children aged five years and under
Interventions for increasing fruit and vegetable consumption in children aged five years and under (2020) · Cochrane
no estimate extracted1 study · 39 participantsVery low
Parent nutrition education interventions vs no intervention
Child fruit and vegetable intake Short‐term impact (< 12 months) · children aged five years and under
Interventions for increasing fruit and vegetable consumption in children aged five years and under (2020) · Cochrane
no estimate extracted11 studies · 3050 participantsVery low
Parent nutrition education interventions vs no intervention
Cost effectiveness Short‐term impact (< 12 months) · children aged five years and under
Interventions for increasing fruit and vegetable consumption in children aged five years and under (2020) · Cochrane
no estimate extracted1 study · 389 participantsVery low
Parent nutrition education interventions vs no intervention
Unintended adverse events Short‐term impact (< 12 months) · children aged five years and under
Interventions for increasing fruit and vegetable consumption in children aged five years and under (2020) · Cochrane
no estimate extracted1 study · 343 participantsVery low
Multicomponent interventions vs no intervention
Child fruit and vegetable intake Short‐term impact (< 12 months) · children aged five years and under
Interventions for increasing fruit and vegetable consumption in children aged five years and under (2020) · Cochrane
no estimate extracted9 studies · 2961 participantsModerate
Multicomponent interventions vs no intervention
Cost effectiveness Short‐term impact (< 12 months) Not reported · children aged five years and under
Interventions for increasing fruit and vegetable consumption in children aged five years and under (2020) · Cochrane
no estimate extractedNRNo studies
Multicomponent interventions vs no intervention
Unintended adverse events Short‐term impact (< 12 months) Not reported · children aged five years and under
Interventions for increasing fruit and vegetable consumption in children aged five years and under (2020) · Cochrane
no estimate extractedNRNo studies
Levosimendan vs dobutamine
All‐cause short‐term mortality: range 15 to 31 days · people with cardiogenic shock or low cardiac output syndrome
Inotropic agents and vasodilator strategies for the treatment of cardiogenic shock or low cardiac output… (2020) · Cochrane
RR 0.6 [0.36, 1.03]4 studies · 1701 participantsLow
Dopexamine vs dopamine
All‐cause long‐term mortality · adults with low cardiac output syndrome
Inotropic agents and vasodilator strategies for the treatment of cardiogenic shock or low cardiac output… (2020) · Cochrane
no estimate extractedNRNo studies
Milrinone vs dobutamine
All‐cause mortality · adults with low cardiac output syndrome
Inotropic agents and vasodilator strategies for the treatment of cardiogenic shock or low cardiac output… (2020) · Cochrane
no estimate extractedNRNo studies
Enoximone vs dobutamine
All‐cause short‐term mortality: 1 month · adults with low cardiac output syndrome
Inotropic agents and vasodilator strategies for the treatment of cardiogenic shock or low cardiac output… (2020) · Cochrane
RR 0.21 [0.01, 4.11]1 study · 37 participantsVery low
Enoximone vs dobutamine
All‐cause long‐term mortality · adults with low cardiac output syndrome
Inotropic agents and vasodilator strategies for the treatment of cardiogenic shock or low cardiac output… (2020) · Cochrane
no estimate extractedNRNo studies
Epinephrine vs norepinephrine
All‐cause short‐term mortality: 28 days · adults with cardiogenic shock
Inotropic agents and vasodilator strategies for the treatment of cardiogenic shock or low cardiac output… (2020) · Cochrane
RR 1.81 [0.89, 3.68]1 study · 57 participantsVery low
Epinephrine vs norepinephrine
All‐cause long‐term mortality: 60 days · adults with cardiogenic shock
Inotropic agents and vasodilator strategies for the treatment of cardiogenic shock or low cardiac output… (2020) · Cochrane
RR 1.41 [0.78, 2.56]1 study · 57 participantsVery low
Dopamine‐milrinone vs dopamine‐dobutamine
All‐cause short‐term mortality: at intensive care unit · adults with cardiogenic shock
Inotropic agents and vasodilator strategies for the treatment of cardiogenic shock or low cardiac output… (2020) · Cochrane
RR 1 [0.34, 2.93]1 study · 20 participantsVery low
Dopamine‐milrinone vs dopamine‐dobutamine
All‐cause long‐term mortality · adults with cardiogenic shock
Inotropic agents and vasodilator strategies for the treatment of cardiogenic shock or low cardiac output… (2020) · Cochrane
no estimate extractedNRNo studies
Enoximone vs piroximone
All‐cause mortality · adults with low cardiac output syndrome
Inotropic agents and vasodilator strategies for the treatment of cardiogenic shock or low cardiac output… (2020) · Cochrane
no estimate extractedNRNo studies
Enoximone vs epinephrine‐nitroglycerine
All‐cause mortality · adults with low cardiac output syndrome
Inotropic agents and vasodilator strategies for the treatment of cardiogenic shock or low cardiac output… (2020) · Cochrane
no estimate extractedNRNo studies
Levosimendan vs dobutamine
All‐cause long‐term mortality: range 4 to 12 months · people with cardiogenic shock or low cardiac output syndrome
Inotropic agents and vasodilator strategies for the treatment of cardiogenic shock or low cardiac output… (2020) · Cochrane
RR 0.84 [0.63, 1.13]4 studies · 1591 participantsLow
Levosimendan vs placebo
All‐cause short‐term mortality: 1 month · adults with cardiogenic shock or low cardiac output syndrome
Inotropic agents and vasodilator strategies for the treatment of cardiogenic shock or low cardiac output… (2020) · Cochrane
no estimate extractedNRNo studies
Levosimendan vs placebo
All‐cause long‐term mortality: range 4 to 6 months · adults with cardiogenic shock or low cardiac output syndrome
Inotropic agents and vasodilator strategies for the treatment of cardiogenic shock or low cardiac output… (2020) · Cochrane
RR 0.55 [0.16, 1.9]2 studies · 55 participantsVery low
Levosimendan vs enoximone
All‐cause short‐term mortality: 30 days · adults with cardiogenic shock
Inotropic agents and vasodilator strategies for the treatment of cardiogenic shock or low cardiac output… (2020) · Cochrane
RR 0.5 [0.22, 1.14]1 study · 32 participantsVery low
Levosimendan vs enoximone
All‐cause long‐term mortality · adults with cardiogenic shock
Inotropic agents and vasodilator strategies for the treatment of cardiogenic shock or low cardiac output… (2020) · Cochrane
no estimate extractedNRNo studies
Epinephrine vs norepinephrine‐dobutamine
All‐cause short‐term mortality: 28 days · adults with cardiogenic shock
Inotropic agents and vasodilator strategies for the treatment of cardiogenic shock or low cardiac output… (2020) · Cochrane
RR 1.25 [0.41, 3.77]1 study · 30 participantsVery low
Epinephrine vs norepinephrine‐dobutamine
All‐cause long‐term mortality · adults with cardiogenic shock
Inotropic agents and vasodilator strategies for the treatment of cardiogenic shock or low cardiac output… (2020) · Cochrane
no estimate extractedNRNo studies
Dopexamine vs dopamine
All‐cause short‐term mortality: time in hospital · adults with low cardiac output syndrome
Inotropic agents and vasodilator strategies for the treatment of cardiogenic shock or low cardiac output… (2020) · Cochrane
no estimate extracted1 study · 70 participantsVery low
Levofloxacin vs standard treatment
All‐cause mortality during hospital stay and all‐cause mortality at 1 year · people with Staphylococcus aureus endocarditis
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
RR 1.12 [0.49, 2.56]1 study · 70 participantsVery low
Lipopeptide antibiotic (daptomycin) vs aminoglycoside (low‐dose gentamicin) plus antistaphylococcal penicillin (nafcillin, oxacillin, or flucloxacillin) or glycopeptide antibiotic (vancomycin)
Adverse events1 · people with endocarditis caused by Staphylococcus aureus
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Lipopeptide antibiotic (daptomycin) vs aminoglycoside (low‐dose gentamicin) plus antistaphylococcal penicillin (nafcillin, oxacillin, or flucloxacillin) or glycopeptide antibiotic (vancomycin)
Congestive heart failure1 · people with endocarditis caused by Staphylococcus aureus
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Lipopeptide antibiotic (daptomycin) vs aminoglycoside (low‐dose gentamicin) plus antistaphylococcal penicillin (nafcillin, oxacillin, or flucloxacillin) or glycopeptide antibiotic (vancomycin)
Septic embolism1 · people with endocarditis caused by Staphylococcus aureus
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Lipopeptide antibiotic (daptomycin) vs aminoglycoside (low‐dose gentamicin) plus antistaphylococcal penicillin (nafcillin, oxacillin, or flucloxacillin) or glycopeptide antibiotic (vancomycin)
Need for cardiac surgical interventions1 · people with endocarditis caused by Staphylococcus aureus
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Lipopeptide antibiotic (daptomycin) vs aminoglycoside (low‐dose gentamicin) plus antistaphylococcal penicillin (nafcillin, oxacillin, or flucloxacillin) or glycopeptide antibiotic (vancomycin)
Uncontrolled infection1 · people with endocarditis caused by Staphylococcus aureus
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies