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
D‐mannose (2 g) vs no treatment
Adverse effects · women with acute cystitis or history of recurrent acute cystitis (preventing and treating)
D‐mannose for preventing and treating urinary tract infections (2022) · Cochrane
RR 16.84 [0.98, 287.92]1 study · 205 participantsVery low
D‐mannose (2 g) vs nitrofurantoin (50 mg)
Symptomatic and bacteriuria‐confirmed UTI (positive culture) · women with acute cystitis or history of recurrent acute cystitis (preventing and treating)
D‐mannose for preventing and treating urinary tract infections (2022) · Cochrane
RR 0.71 [0.39, 1.31]1 study · 206 participantsVery low
D‐mannose (2 g) vs nitrofurantoin (50 mg)
Symptomatic only UTI · women with acute cystitis or history of recurrent acute cystitis (preventing and treating)
D‐mannose for preventing and treating urinary tract infections (2022) · Cochrane
no estimate extractedNRNo studies
Hypoxia‐inducible factor (HIF) stabilisers vs placebo
Cardiovascular death Median · people with CKD (including HD and PD)
Hypoxia‐inducible factor stabilisers for the anaemia of chronic kidney disease (2022) · Cochrane
RR 3.68 [0.19, 70.21]10 studies · 1114 participantsVery low
Hypoxia‐inducible factor (HIF) stabilisers vs erythropoiesis‐stimulating agent (ESA)
Life participation · people with CKD (including HD and PD)
Hypoxia‐inducible factor stabilisers for the anaemia of chronic kidney disease (2022) · Cochrane
no estimate extractedNRNo studies
Hypoxia‐inducible factor (HIF) stabilisers vs erythropoiesis‐stimulating agent (ESA)
Nonfatal myocardial infarction Median · people with CKD (including HD and PD)
Hypoxia‐inducible factor stabilisers for the anaemia of chronic kidney disease (2022) · Cochrane
RR 0.91 [0.76, 1.1]7 studies · 7765 participantsLow
Hypoxia‐inducible factor (HIF) stabilisers vs erythropoiesis‐stimulating agent (ESA)
Nonfatal stroke Median · people with CKD (including HD and PD)
Hypoxia‐inducible factor stabilisers for the anaemia of chronic kidney disease (2022) · Cochrane
RR 1.06 [0.71, 1.56]5 studies · 7285 participantsLow
Hypoxia‐inducible factor (HIF) stabilisers vs erythropoiesis‐stimulating agent (ESA)
Proportion of patients requiring blood transfusion Median · people with CKD (including HD and PD)
Hypoxia‐inducible factor stabilisers for the anaemia of chronic kidney disease (2022) · Cochrane
RR 0.87 [0.76, 1]11 studies · 10786 participantsModerate
Hypoxia‐inducible factor (HIF) stabilisers vs erythropoiesis‐stimulating agent (ESA)
Proportion reaching target haemoglobin Median · people with CKD (including HD and PD)
Hypoxia‐inducible factor stabilisers for the anaemia of chronic kidney disease (2022) · Cochrane
RR 1 [0.93, 1.07]14 studies · 4601 participantsLow
Hypoxia‐inducible factor (HIF) stabilisers vs placebo
Fatigue · people with CKD (including HD and PD)
Hypoxia‐inducible factor stabilisers for the anaemia of chronic kidney disease (2022) · Cochrane
no estimate extractedNRNo studies
Hypoxia‐inducible factor (HIF) stabilisers vs placebo
Life participation · people with CKD (including HD and PD)
Hypoxia‐inducible factor stabilisers for the anaemia of chronic kidney disease (2022) · Cochrane
no estimate extractedNRNo studies
Hypoxia‐inducible factor (HIF) stabilisers vs placebo
Nonfatal myocardial infarction Median · people with CKD (including HD and PD)
Hypoxia‐inducible factor stabilisers for the anaemia of chronic kidney disease (2022) · Cochrane
RR 1.29 [0.31, 5.36]3 studies · 822 participantsVery low
Hypoxia‐inducible factor (HIF) stabilisers vs placebo
Nonfatal stroke Median · people with CKD (including HD and PD)
Hypoxia‐inducible factor stabilisers for the anaemia of chronic kidney disease (2022) · Cochrane
no estimate extracted2 studies · 228 participantsVery low
Hypoxia‐inducible factor (HIF) stabilisers vs placebo
Proportion of patients requiring blood transfusion Median · people with CKD (including HD and PD)
Hypoxia‐inducible factor stabilisers for the anaemia of chronic kidney disease (2022) · Cochrane
RR 0.51 [0.44, 0.6]8 studies · 4329 participantsModerate
Hypoxia‐inducible factor (HIF) stabilisers vs placebo
Proportion reaching target haemoglobin Median · people with CKD (including HD and PD)
Hypoxia‐inducible factor stabilisers for the anaemia of chronic kidney disease (2022) · Cochrane
RR 8.36 [6.42, 10.89]10 studies · 5102 participantsModerate
Hypoxia‐inducible factor (HIF) stabilisers vs erythropoiesis‐stimulating agent (ESA)
Cardiovascular death Median · people with CKD (including HD and PD)
Hypoxia‐inducible factor stabilisers for the anaemia of chronic kidney disease (2022) · Cochrane
RR 1.05 [0.88, 1.26]17 studies · 10340 participantsLow
Hypoxia‐inducible factor (HIF) stabilisers vs erythropoiesis‐stimulating agent (ESA)
Fatigue Median · people with CKD (including HD and PD)
Hypoxia‐inducible factor stabilisers for the anaemia of chronic kidney disease (2022) · Cochrane
RR 0.8 [0.56, 1.16]2 studies · 3471 participantsVery low
Any exercise vs no exercise or placebo exercise
Death (any cause · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
RR 0.95 [0.56, 1.62]1 study · 296 participantsVery low
Aerobic exercise vs no exercise or placebo exercise
Cardiovascularevents · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extractedNRNo studies
Aerobic exercise vs no exercise or placebo exercise
Fatigue · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted4 studies · 221 participantsVery low
Aerobic exercise vs no exercise or placebo exercise
HRQoL: Physical component scoreAssessed: SF‐36Scale: 0 to 100 · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted9 studies · 306 participantsVery low
Aerobic exercise vs no exercise or placebo exercise
HRQoL: Mental component scoreAssessed: SF‐36Scale: 0 to 100 · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted9 studies · 306 participantsVery low
Aerobic exercise vs no exercise or placebo exercise
PainAssessed: SF‐36Scale: 0 to 100 · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted8 studies · 570 participantsLow
Aerobic exercise vs no exercise or placebo exercise
DepressionAssessed: multiple severity of depressive symptoms scales · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted4 studies · 127 participantsVery low
Aerobic exercise vs no exercise or placebo exercise
Functional capacityAssessed: 6MWT · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted10 studies · 515 participantsModerate
Resistance exercise vs no exercise or placebo exercise
Death (any cause) · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extractedNRNo studies
Resistance exercise vs no exercise or placebo exercise
Cardiovascular events · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extractedNRNo studies
Resistance exercise vs no exercise or placebo exercise
Fatigue Assessed: Profile of Mood States score · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted1 study · 68 participantsVery low
Any exercise vs no exercise or placebo exercise
Cardiovascularevents · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extractedNRNo studies
Resistance exercise vs no exercise or placebo exercise
HRQoL: Physical component scoreAssessed: SF‐36Scale: 0 to 100 · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted5 studies · 176 participantsVery low
Resistance exercise vs no exercise or placebo exercise
HRQoL: Mental component scoreAssessed: SF‐36Scale: 0 to 100 · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted5 studies · 176 participantsVery low
Resistance exercise vs no exercise or placebo exercise
PainAssessed: SF‐36Scale: 0 to 100 · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted5 studies · 154 participantsVery low
Resistance exercise vs no exercise or placebo exercise
DepressionAssessed: multiple severity of depressive symptoms scales · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted2 studies · 99 participantsVery low
Resistance exercise vs no exercise or placebo exercise
Functional capacityAssessed: 6MWT · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted7 studies · 216 participantsModerate
Combined aerobic and resistance exercise vs no exercise or placebo exercise
Death (any cause) · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extractedNRNo studies
Combined aerobic and resistance exercise vs no exercise or placebo exercise
Cardiovascular events · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extractedNRNo studies
Combined aerobic and resistance exercise vs no exercise or placebo exercise
Fatigue · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extractedNRNo studies
Combined aerobic and resistance exercise vs no exercise or placebo exercise
HRQoL: Physical component scoreAssessed: SF‐36Scale: 0 to 100 · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted6 studies · 228 participantsVery low
Combined aerobic and resistance exercise vs no exercise or placebo exercise
HRQoL: Mental component scoreAssessed: SF‐36Scale: 0 to 100 · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted6 studies · 228 participantsVery low
Any exercise vs no exercise or placebo exercise
Fatigue · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted6 studies · 326 participantsLow
Combined aerobic and resistance exercise vs no exercise or placebo exercise
PainAssessed: SF‐36Scale: 0 to 100 · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted3 studies · 161 participantsVery low
Combined aerobic and resistance exercise vs no exercise or placebo exercise
DepressionAssessed: multiple severity of depressive symptoms scales · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted4 studies · 214 participantsVery low
Combined aerobic and resistance exercise vs no exercise or placebo exercise
Functional capacityAssessed: 6MWT · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted6 studies · 138 participantsModerate
Any exercise vs no exercise or placebo exercise
HRQoL: Physical component scoreAssessed: SF‐36Scale: 0 to 100 · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted17 studies · 656 participantsLow
Any exercise vs no exercise or placebo exercise
HRQoL: Mental component scoreAssessed: SF‐36Scale: 0 to 100 · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted17 studies · 656 participantsVery low
Any exercise vs no exercise or placebo exercise
PainAssessed: SF‐36Scale: 0 to 100 · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted15 studies · 872 participantsLow
Any exercise vs no exercise or placebo exercise
DepressionAssessed: multiple severity of depressive symptoms scales · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted11 studies · 490 participantsModerate
Any exercise vs no exercise or placebo exercise
Functional capacityAssessed: 6MWT · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
no estimate extracted19 studies · 827 participantsModerate
Aerobic exercise vs no exercise or placebo exercise
Death (any cause) · adults undergoing maintenance dialysis
Exercise training for adults undergoing maintenance dialysis (2022) · Cochrane
RR 0.95 [0.56, 1.62]1 study · 296 participantsVery low
Synbiotics vs placebo
GI function · adult solid organ transplant recipients (kidney)
Synbiotics, prebiotics and probiotics for solid organ transplant recipients (2022) · Cochrane
no estimate extractedNRNo studies