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)

2,434 questions in 139 reviews · Kidney and Transplant

current versions
No studies 504 · 20.7%Ungraded 40 · 1.6%Very low 611 · 25.1%Low 790 · 32.5%Moderate 414 · 17%High 75 · 3.1%

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
More intensive vs less intensive insulin therapy
Death (any cause) Time frame: 1 to 5 years · pre‐existing and new‐onset diabetes in kidney transplant recipients
Glucose‐lowering agents for treating pre‐existing and new‐onset diabetes in kidney transplant recipients (2020) · Cochrane
RR 0.68 [0.29, 1.58]3 studies · 208 participantsVery low
More intensive vs less intensive insulin therapy
Hypoglycaemia Time frame: 13 months to 5 years · pre‐existing and new‐onset diabetes in kidney transplant recipients
Glucose‐lowering agents for treating pre‐existing and new‐onset diabetes in kidney transplant recipients (2020) · Cochrane
no estimate extracted4 studies · 301 participantsVery low
More intensive vs less intensive insulin therapy
Discontinuation of medication due to adverse events Time frame: 1 year · pre‐existing and new‐onset diabetes in kidney transplant recipients
Glucose‐lowering agents for treating pre‐existing and new‐onset diabetes in kidney transplant recipients (2020) · Cochrane
no estimate extracted1 study · 60 participantsVery low
DPP‐4 inhibitors vs placebo
Transplant or graft survival · pre‐existing and new‐onset diabetes in kidney transplant recipients
Glucose‐lowering agents for treating pre‐existing and new‐onset diabetes in kidney transplant recipients (2020) · Cochrane
no estimate extractedNRNo studies
Dihydropyridine calcium channel blockers vs placebo/control
Predialysis systolic blood pressure · people with CKD requiring dialysis
Calcium channel blockers for people with chronic kidney disease requiring dialysis (2020) · Cochrane
no estimate extracted1 study · 39 participantsLow
Dihydropyridine calcium channel blockers vs other antihypertensives
Other side effects · people with CKD requiring dialysis
Calcium channel blockers for people with chronic kidney disease requiring dialysis (2020) · Cochrane
no estimate extractedNRNo studies
Dihydropyridine vs non‐dihydropyridine calcium channel blockers
Predialysis systolic blood pressure · people with CKD requiring dialysis
Calcium channel blockers for people with chronic kidney disease requiring dialysis (2020) · Cochrane
no estimate extracted1 study · 40 participantsLow
Dihydropyridine vs non‐dihydropyridine calcium channel blockers
Predialysis diastolic blood pressure · people with CKD requiring dialysis
Calcium channel blockers for people with chronic kidney disease requiring dialysis (2020) · Cochrane
no estimate extracted1 study · 40 participantsLow
Dihydropyridine vs non‐dihydropyridine calcium channel blockers
Cardiovascular death · people with CKD requiring dialysis
Calcium channel blockers for people with chronic kidney disease requiring dialysis (2020) · Cochrane
no estimate extracted1 study · 40 participantsUngraded
Dihydropyridine vs non‐dihydropyridine calcium channel blockers
Intradialytic hypotension · people with CKD requiring dialysis
Calcium channel blockers for people with chronic kidney disease requiring dialysis (2020) · Cochrane
no estimate extractedNRNo studies
Dihydropyridine vs non‐dihydropyridine calcium channel blockers
Other side effects1,5 · people with CKD requiring dialysis
Calcium channel blockers for people with chronic kidney disease requiring dialysis (2020) · Cochrane
RR 0.13 [0.01, 2.36]1 study · 40 participantsVery low
Dihydropyridine calcium channel blockers vs placebo/control
Predialysis diastolic blood pressure · people with CKD requiring dialysis
Calcium channel blockers for people with chronic kidney disease requiring dialysis (2020) · Cochrane
no estimate extracted2 studies · 76 participantsLow
Dihydropyridine calcium channel blockers vs placebo/control
Cardiovascular death · people with CKD requiring dialysis
Calcium channel blockers for people with chronic kidney disease requiring dialysis (2020) · Cochrane
no estimate extracted3 studies · 124 participantsUngraded
Dihydropyridine calcium channel blockers vs placebo/control
Intradialytic hypotension · people with CKD requiring dialysis
Calcium channel blockers for people with chronic kidney disease requiring dialysis (2020) · Cochrane
RR 0.54 [0.25, 1.15]2 studies · 287 participantsLow
Dihydropyridine calcium channel blockers vs placebo/control
Other side effects · people with CKD requiring dialysis
Calcium channel blockers for people with chronic kidney disease requiring dialysis (2020) · Cochrane
no estimate extractedNRNo studies
Dihydropyridine calcium channel blockers vs other antihypertensives
Predialysis systolic blood pressure · people with CKD requiring dialysis
Calcium channel blockers for people with chronic kidney disease requiring dialysis (2020) · Cochrane
no estimate extracted4 studies · 180 participantsLow
Dihydropyridine calcium channel blockers vs other antihypertensives
Predialysis diastolic blood pressure · people with CKD requiring dialysis
Calcium channel blockers for people with chronic kidney disease requiring dialysis (2020) · Cochrane
no estimate extracted4 studies · 180 participantsLow
Dihydropyridine calcium channel blockers vs other antihypertensives
Cardiovascular death · people with CKD requiring dialysis
Calcium channel blockers for people with chronic kidney disease requiring dialysis (2020) · Cochrane
no estimate extracted3 studies · 164 participantsUngraded
Dihydropyridine calcium channel blockers vs other antihypertensives
Intradialytic hypotension · people with CKD requiring dialysis
Calcium channel blockers for people with chronic kidney disease requiring dialysis (2020) · Cochrane
RR 2.88 [0.12, 68.79]1 study · 92 participantsVery low
Pharmacological interventions vs placebo
GABA analogue VAS(0 to 10 cm) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted5 studies · 297 participantsHigh
Pharmacological interventions vs placebo
Montelukast Duo score (0 to 81) and VAS (0 to 10 cm) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted2 studies · 87 participantsModerate
Pharmacological interventions vs placebo
Sertraline VAS(0 to 10 cm) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted1 study · 46 participantsLow
Pharmacological interventions vs placebo
Lidocaine Itch relief · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted1 study · 16 participantsVery low
Pharmacological interventions vs placebo
Sodium thalidomide Itch relief · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted1 study · 33 participantsVery low
Pharmacological interventions vs placebo
Doxepin Itch relief · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted1 study · 48 participantsLow
Topical treatments vs placebo
Capsaicin cream VAS and Duo’s score · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted2 studies · 112 participantsModerate
Topical treatments vs placebo
Pramoxine lotion VAS(0 to 10 cm) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted1 study · 27 participantsVery low
Topical treatments vs placebo
Calcineurin inhibitor VAS(0 to 10 cm) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted2 studies · 80 participantsVery low
Topical treatments vs placebo
Dead Sea lotion 1 to 5 severity score · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted1 study · 41 participantsVery low
Topical treatments vs placebo
Cromolyn cream VAS (0 to 5 cm) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted1 study · 60 participantsLow
Pharmacological interventions vs placebo
Ondansetron VAS(0 to 10 cm) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted3 studies · 183 participantsHigh
Topical treatments vs placebo
Baby oil Itch Severity Scale(0 to 21) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted2 studies · 125 participantsLow
Topical treatments vs placebo
L‐arginine salve 0 to 3 severity score · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted1 study · 48 participantsLow
Topical treatments vs placebo
Polyunsaturated fatty acids VAS (0 to 10 cm) Duo score · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted2 studies · 78 participantsLow
Intervention NR
Polyunsaturated fatty acids 0 to 5severity score · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted1 study · 22 participantsLow
Intervention NR
L‐carnitine VAS (0 to 6 cm) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted1 study · 12 participantsLow
Intervention NR
Zinc sulfate VAS (0 to 10 cm) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted2 studies · 76 participantsModerate
Intervention NR
Ergocalciferol 21 point scale · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted1 study · 50 participantsLow
Intervention NR
Turmeric Duo score (5 to 40) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted1 study · 100 participantsModerate
Intervention NR
Fumaria parviflora VAS (0 to 10 cm) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted1 study · 63 participantsLow
Intervention NR
High flux/permeability dialysis VAS (0 to 10 cm) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted3 studies · 202 participantsLow
Pharmacological interventions vs placebo
Kappa‐opioid agonist VAS(0 to 10 cm) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted5 studies · 661 participantsHigh
Intervention NR
HD with haemoperfusion VAS (0 to 10 cm) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted1 study · 90 participantsLow
Intervention NR
UV‐B Duo score, VAS, and %improvement · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted4 studies · 86 participantsLow
Intervention NR
Thermal therapy VAS (0 to 10 cm) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted1 study · 41 participantsLow
Pharmacological interventions vs placebo
Mu‐opioid antagonist VAS(0 to 10 cm) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted2 studies · 62 participantsLow
Pharmacological interventions vs placebo
Nalbuphine VAS(0 to 10 cm) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted1 study · 179 participantsLow
Pharmacological interventions vs placebo
Cromolyn VAS(0 to 10 cm) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted1 study · 40 participantsLow
Pharmacological interventions vs placebo
Nicotinamide VAS(0 to 5 cm) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted1 study · 50 participantsLow
Pharmacological interventions vs placebo
EPO Duo score(0 to 40) · uraemic pruritus
Interventions for itch in people with advanced chronic kidney disease (2020) · Cochrane
no estimate extracted1 study · 20 participantsVery low