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
Glycopeptide (vancomycin or teicoplanin) plus aminoglycoside (gentamicin) vs beta‐lactam (cloxacillin) plus aminoglycoside (gentamicin)
All‐cause mortality during hospital stay and all‐cause mortality at 1 year · people with endocarditis due to Staphylococcus aureus in drug abusers
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Glycopeptide (vancomycin or teicoplanin) plus aminoglycoside (gentamicin) vs beta‐lactam (cloxacillin) plus aminoglycoside (gentamicin)
Cure · people with endocarditis due to Staphylococcus aureus in drug abusers
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
RR 0.59 [0.4, 0.85]1 study · 34 participantsLow
Glycopeptide (vancomycin or teicoplanin) plus aminoglycoside (gentamicin) vs beta‐lactam (cloxacillin) plus aminoglycoside (gentamicin)
Adverse events · people with endocarditis due to Staphylococcus aureus in drug abusers
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
RR 5.5 [0.33, 91.44]1 study · 34 participantsVery low
Glycopeptide (vancomycin or teicoplanin) plus aminoglycoside (gentamicin) vs beta‐lactam (cloxacillin) plus aminoglycoside (gentamicin)
Congestive heart failure · people with endocarditis due to Staphylococcus aureus in drug abusers
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Glycopeptide (vancomycin or teicoplanin) plus aminoglycoside (gentamicin) vs beta‐lactam (cloxacillin) plus aminoglycoside (gentamicin)
Septic embolism · people with endocarditis due to Staphylococcus aureus in drug abusers
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Levofloxacin vs standard treatment
Cure4 · people with Staphylococcus aureus endocarditis
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Glycopeptide (vancomycin or teicoplanin) plus aminoglycoside (gentamicin) vs beta‐lactam (cloxacillin) plus aminoglycoside (gentamicin)
Need for cardiac surgical interventions · people with endocarditis due to Staphylococcus aureus in drug abusers
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Glycopeptide (vancomycin or teicoplanin) plus aminoglycoside (gentamicin) vs beta‐lactam (cloxacillin) plus aminoglycoside (gentamicin)
Uncontrolled infection · people with endocarditis due to Staphylococcus aureus in drug abusers
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Beta‐lactam (ceftriaxone) plus aminoglycoside (gentamicin) vs beta‐lactam (ceftriaxone)
All‐cause mortality during hospital stay and all‐cause mortality at 1 year · people with infective endocarditis due to penicillin‐susceptible streptococci
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Beta‐lactam (ceftriaxone) plus aminoglycoside (gentamicin) vs beta‐lactam (ceftriaxone)
Cure · people with infective endocarditis due to penicillin‐susceptible streptococci
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
RR 0.69 [0.44, 1.1]1 study · 67 participantsLow
Beta‐lactam (ceftriaxone) plus aminoglycoside (gentamicin) vs beta‐lactam (ceftriaxone)
Adverse events · people with infective endocarditis due to penicillin‐susceptible streptococci
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
RR 0.58 [0.15, 2.24]1 study · 67 participantsVery low
Beta‐lactam (ceftriaxone) plus aminoglycoside (gentamicin) vs beta‐lactam (ceftriaxone)
Congestive heart failure · people with infective endocarditis due to penicillin‐susceptible streptococci
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Beta‐lactam (ceftriaxone) plus aminoglycoside (gentamicin) vs beta‐lactam (ceftriaxone)
Septic embolism · people with infective endocarditis due to penicillin‐susceptible streptococci
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Beta‐lactam (ceftriaxone) plus aminoglycoside (gentamicin) vs beta‐lactam (ceftriaxone)
Need for cardiac surgical interventions · people with infective endocarditis due to penicillin‐susceptible streptococci
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
RR 1.75 [0.65, 4.67]1 study · 67 participantsVery low
Beta‐lactam (ceftriaxone) plus aminoglycoside (gentamicin) vs beta‐lactam (ceftriaxone)
Uncontrolled infection · people with infective endocarditis due to penicillin‐susceptible streptococci
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
RR 0.97 [0.06, 14.88]1 study · 67 participantsVery low
Fosfomycin plus imipenem vs vancomycin
All‐cause mortality during hospital stay and all‐cause mortality at 1 year · people with infective endocarditis due to methicillin‐resistant Staphylococcus aureus
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
RR 7 [0.47, 103.27]1 study · 8 participantsVery low
Levofloxacin vs standard treatment
Adverse events4 · people with Staphylococcus aureus endocarditis
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Fosfomycin plus imipenem vs vancomycin
Cure · people with infective endocarditis due to methicillin‐resistant Staphylococcus aureus
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
RR 0.5 [0.07, 3.55]1 study · 8 participantsVery low
Fosfomycin plus imipenem vs vancomycin
Adverse events · people with infective endocarditis due to methicillin‐resistant Staphylococcus aureus
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
RR 1 [0.25, 4]1 study · 8 participantsVery low
Fosfomycin plus imipenem vs vancomycin
Congestive heart failure · people with infective endocarditis due to methicillin‐resistant Staphylococcus aureus
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
RR 9 [0.64, 126.85]1 study · 8 participantsVery low
Fosfomycin plus imipenem vs vancomycin
Septic embolism · people with infective endocarditis due to methicillin‐resistant Staphylococcus aureus
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Fosfomycin plus imipenem vs vancomycin
Need for cardiac surgical interventions · people with infective endocarditis due to methicillin‐resistant Staphylococcus aureus
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
RR 2 [0.28, 14.2]1 study · 8 participantsVery low
Fosfomycin plus imipenem vs vancomycin
Uncontrolled infection · people with infective endocarditis due to methicillin‐resistant Staphylococcus aureus
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Partial oral treatment vs conventional intravenous treatment of endocarditis on the left side of the heart (on native or prosthetic valves) and bacteraemia
All‐cause mortality during hospital stay and all‐cause mortality at 1 year · people with endocarditis on the left side of the heart (on native or prosthetic valves) with bacteraemia for…
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
RR 0.53 [0.22, 1.31]1 study · 400 participantsVery low
Partial oral treatment vs conventional intravenous treatment of endocarditis on the left side of the heart (on native or prosthetic valves) and bacteraemia
Cure · people with endocarditis on the left side of the heart (on native or prosthetic valves) with bacteraemia for…
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Partial oral treatment vs conventional intravenous treatment of endocarditis on the left side of the heart (on native or prosthetic valves) and bacteraemia
Adverse events · people with endocarditis on the left side of the heart (on native or prosthetic valves) with bacteraemia for…
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
RR 0.83 [0.36, 1.87]1 study · 400 participantsLow
Partial oral treatment vs conventional intravenous treatment of endocarditis on the left side of the heart (on native or prosthetic valves) and bacteraemia
Congestive heart failure · people with endocarditis on the left side of the heart (on native or prosthetic valves) with bacteraemia for…
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
RR 0.33 [0.01, 8.05]1 study · 400 participantsVery low
Levofloxacin vs standard treatment
Congestive heart failure4 · people with Staphylococcus aureus endocarditis
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Partial oral treatment vs conventional intravenous treatment of endocarditis on the left side of the heart (on native or prosthetic valves) and bacteraemia
Need for cardiac surgicalinterventions · people with endocarditis on the left side of the heart (on native or prosthetic valves) with bacteraemia for…
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
RR 0.99 [0.32, 3.02]1 study · 400 participantsVery low
Partial oral treatment vs conventional intravenous treatment of endocarditis on the left side of the heart (on native or prosthetic valves) and bacteraemia
Septic embolism · people with endocarditis on the left side of the heart (on native or prosthetic valves) with bacteraemia for…
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
RR 0.99 [0.2, 4.85]1 study · 400 participantsVery low
Partial oral treatment vs conventional intravenous treatment of endocarditis on the left side of the heart (on native or prosthetic valves) and bacteraemia
Uncontrolled infection · people with endocarditis on the left side of the heart (on native or prosthetic valves) with bacteraemia for…
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Levofloxacin vs standard treatment
Septic embolism4 · people with Staphylococcus aureus endocarditis
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Levofloxacin vs standard treatment
Need for cardiac surgical interventions4 · people with Staphylococcus aureus endocarditis
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
no estimate extractedNRNo studies
Levofloxacin vs standard treatment
Uncontrolled infection4 · people with Staphylococcus aureus endocarditis
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)
All‐cause mortality during hospital stay and all‐cause mortality at 1 year1 · 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)
Cure · people with endocarditis caused by Staphylococcus aureus
A comparison of different antibiotic regimens for the treatment of infective endocarditis (2020) · Cochrane
RR 0.89 [0.42, 1.89]1 study · 53 participantsVery low
Effect of reducing saturated fat vs usual saturated fat on CVD risk
All‐cause mortality · people at any baseline risk of CVD
Reduction in saturated fat intake for cardiovascular disease (2020) · Cochrane
RR 0.96 [0.9, 1.03]12 studies · 55858 participantsModerate
Effect of reducing saturated fat vs usual saturated fat on CVD risk
Cardiovascular mortality · people at any baseline risk of CVD
Reduction in saturated fat intake for cardiovascular disease (2020) · Cochrane
RR 0.94 [0.78, 1.13]11 studies · 53421 participantsModerate
Effect of reducing saturated fat vs usual saturated fat on CVD risk
Combined cardiovascular events · people at any baseline risk of CVD
Reduction in saturated fat intake for cardiovascular disease (2020) · Cochrane
RR 0.83 [0.7, 0.98]13 studies · 53758 participantsModerate
Effect of reducing saturated fat vs usual saturated fat on CVD risk
Myocardial infarctions · people at any baseline risk of CVD
Reduction in saturated fat intake for cardiovascular disease (2020) · Cochrane
RR 0.9 [0.8, 1.01]11 studies · 53167 participantsVery low
Effect of reducing saturated fat vs usual saturated fat on CVD risk
Non‐fatal MI · people at any baseline risk of CVD
Reduction in saturated fat intake for cardiovascular disease (2020) · Cochrane
RR 0.97 [0.87, 1.07]8 studies · 52834 participantsLow
Effect of reducing saturated fat vs usual saturated fat on CVD risk
Stroke · people at any baseline risk of CVD
Reduction in saturated fat intake for cardiovascular disease (2020) · Cochrane
RR 0.92 [0.68, 1.25]7 studies · 50952 participantsVery low
Effect of reducing saturated fat vs usual saturated fat on CVD risk
CHD mortality · people at any baseline risk of CVD
Reduction in saturated fat intake for cardiovascular disease (2020) · Cochrane
RR 0.97 [0.82, 1.16]9 studies · 53159 participantsLow
Effect of reducing saturated fat vs usual saturated fat on CVD risk
CHD events · people at any baseline risk of CVD
Reduction in saturated fat intake for cardiovascular disease (2020) · Cochrane
RR 0.83 [0.68, 1.01]11 studies · 53199 participantsVery low
Alirocumab vs placebo
CVD · people at high risk of CVD (history of CVD or high LDL‐C despite treatment)
PCSK9 monoclonal antibodies for the primary and secondary prevention of cardiovascular disease (2020) · Cochrane
OR 0.87 [0.8, 0.94]10 studies · 23868 participantsHigh
Alirocumab vs ezetimibe and statins
All‐cause mortality · people at high risk of CVD (history of CVD or high LDL‐C despite treatment)
PCSK9 monoclonal antibodies for the primary and secondary prevention of cardiovascular disease (2020) · Cochrane
OR 0.51 [0.18, 1.4]5 studies · 1733 participantsLow
Alirocumab vs ezetimibe and statins
Myocardial infarction · people at high risk of CVD (history of CVD or high LDL‐C despite treatment)
PCSK9 monoclonal antibodies for the primary and secondary prevention of cardiovascular disease (2020) · Cochrane
OR 1.45 [0.64, 3.28]5 studies · 1734 participantsLow
Alirocumab vs ezetimibe and statins
Any stroke · people at high risk of CVD (history of CVD or high LDL‐C despite treatment)
PCSK9 monoclonal antibodies for the primary and secondary prevention of cardiovascular disease (2020) · Cochrane
OR 0.85 [0.13, 5.61]5 studies · 1734 participantsLow
Evolocumab vs ezetimibe and statins
CVD · people at high risk of CVD (history of CVD or high LDL‐C despite treatment)
PCSK9 monoclonal antibodies for the primary and secondary prevention of cardiovascular disease (2020) · Cochrane
OR 0.66 [0.14, 3.04]1 study · 218 participantsVery low
Evolocumab vs ezetimibe and statins
All‐cause mortality · people at high risk of CVD (history of CVD or high LDL‐C despite treatment)
PCSK9 monoclonal antibodies for the primary and secondary prevention of cardiovascular disease (2020) · Cochrane
OR 0.43 [0.14, 1.3]3 studies · 5223 participantsVery low