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
Angiotensin receptor blockers (ARBs) vs angiotensin‐converting enzyme inhibitors (ACEis)
Residual kidney function (12 months) · patients receiving PD
Angiotensin‐converting enzyme inhibitors and angiotensin receptor blockers for preserving residual kidney… (2014) · Cochrane
no estimate extracted1 study · 60 participantsModerate
Angiotensin receptor blockers (ARBs) vs angiotensin‐converting enzyme inhibitors (ACEis)
Anuria · patients receiving PD
Angiotensin‐converting enzyme inhibitors and angiotensin receptor blockers for preserving residual kidney… (2014) · Cochrane
RR 1.15 [0.41, 3.26]1 study · 60 participantsModerate
Angiotensin receptor blockers (ARBs) vs angiotensin‐converting enzyme inhibitors (ACEis)
Cardiovascular events (non‐fatal) · patients receiving PD
Angiotensin‐converting enzyme inhibitors and angiotensin receptor blockers for preserving residual kidney… (2014) · Cochrane
RR 1.33 [0.33, 5.45]1 study · 60 participantsModerate
Angiotensin receptor blockers (ARBs) vs angiotensin‐converting enzyme inhibitors (ACEis)
Serum potassium · patients receiving PD
Angiotensin‐converting enzyme inhibitors and angiotensin receptor blockers for preserving residual kidney… (2014) · Cochrane
no estimate extracted1 study · 42 participantsModerate
Angiotensin receptor blockers (ARBs) vs angiotensin‐converting enzyme inhibitors (ACEis)
Systolic BP · patients receiving PD
Angiotensin‐converting enzyme inhibitors and angiotensin receptor blockers for preserving residual kidney… (2014) · Cochrane
no estimate extracted1 study · 42 participantsModerate
Angiotensin receptor blockers (ARBs) vs angiotensin‐converting enzyme inhibitors (ACEis)
Diastolic BP · patients receiving PD
Angiotensin‐converting enzyme inhibitors and angiotensin receptor blockers for preserving residual kidney… (2014) · Cochrane
no estimate extracted1 study · 42 participantsModerate
Angiotensin receptor blockers (ARBs) vs angiotensin‐converting enzyme inhibitors (ACEis)
Cough · patients receiving PD
Angiotensin‐converting enzyme inhibitors and angiotensin receptor blockers for preserving residual kidney… (2014) · Cochrane
RR 1.56 [0.24, 10.05]1 study · 60 participantsModerate
Angiotensin receptor blockers (ARBs) vs conventional therapy
Residual kidney function (≥ 12 months) · patients receiving PD
Angiotensin‐converting enzyme inhibitors and angiotensin receptor blockers for preserving residual kidney… (2014) · Cochrane
no estimate extracted3 studies · 110 participantsModerate
Angiotensin receptor blockers (ARBs) vs angiotensin‐converting enzyme inhibitors (ACEis)
Hyperkalaemia · patients receiving PD
Angiotensin‐converting enzyme inhibitors and angiotensin receptor blockers for preserving residual kidney… (2014) · Cochrane
RR 1.23 [0.35, 4.4]2 studies · 144 participantsModerate
Angiotensin receptor blockers (ARBs) vs conventional therapy
Residual kidney function (12 months) · patients receiving PD
Angiotensin‐converting enzyme inhibitors and angiotensin receptor blockers for preserving residual kidney… (2014) · Cochrane
no estimate extracted1 study · 44 participantsModerate
Angiotensin receptor blockers (ARBs) vs conventional therapy
Residual kidney function (24 months) · patients receiving PD
Angiotensin‐converting enzyme inhibitors and angiotensin receptor blockers for preserving residual kidney… (2014) · Cochrane
no estimate extracted2 studies · 66 participantsModerate
Angiotensin receptor blockers (ARBs) vs conventional therapy
Urinary protein excretion · patients receiving PD
Angiotensin‐converting enzyme inhibitors and angiotensin receptor blockers for preserving residual kidney… (2014) · Cochrane
no estimate extracted2 studies · 66 participantsLow
Angiotensin receptor blockers (ARBs) vs conventional therapy
Kt/V · patients receiving PD
Angiotensin‐converting enzyme inhibitors and angiotensin receptor blockers for preserving residual kidney… (2014) · Cochrane
no estimate extracted2 studies · 76 participantsModerate
Angiotensin receptor blockers (ARBs) vs conventional therapy
Weekly creatinine clearance · patients receiving PD
Angiotensin‐converting enzyme inhibitors and angiotensin receptor blockers for preserving residual kidney… (2014) · Cochrane
no estimate extracted3 studies · 110 participantsLow
Angiotensin receptor blockers (ARBs) vs conventional therapy
Systolic BP · patients receiving PD
Angiotensin‐converting enzyme inhibitors and angiotensin receptor blockers for preserving residual kidney… (2014) · Cochrane
no estimate extracted3 studies · 110 participantsModerate
Intervention NR
Death · Kidney transplant recipients
Belatacept for kidney transplant recipients (2014) · Cochrane
no estimate extracted4 studies · 1516 participantsHigh
Intervention NR
Loss of kidney transplant · Kidney transplant recipients
Belatacept for kidney transplant recipients (2014) · Cochrane
no estimate extracted4 studies · 1516 participantsHigh
Intervention NR
Acute rejection · Kidney transplant recipients
Belatacept for kidney transplant recipients (2014) · Cochrane
no estimate extracted4 studies · 1516 participantsHigh
Intervention NR
Chronic kidney scarring · Kidney transplant recipients
Belatacept for kidney transplant recipients (2014) · Cochrane
no estimate extracted3 studies · 1350 participantsHigh
Intervention NR
Malignancy · Kidney transplant recipients
Belatacept for kidney transplant recipients (2014) · Cochrane
no estimate extracted4 studies · 1516 participantsModerate
Intervention NR
PTLD · Kidney transplant recipients
Belatacept for kidney transplant recipients (2014) · Cochrane
no estimate extracted4 studies · 1516 participantsModerate
Intervention NR
New onset diabetes · Kidney transplant recipients
Belatacept for kidney transplant recipients (2014) · Cochrane
no estimate extracted4 studies · 1049 participantsModerate
Intervention NR
Delayed graft function · Kidney transplant recipients
Belatacept for kidney transplant recipients (2014) · Cochrane
no estimate extracted2 studies · 1209 participantsHigh
Intervention NR
Presence of donor specific antibodies · Kidney transplant recipients
Belatacept for kidney transplant recipients (2014) · Cochrane
no estimate extracted2 studies · 1209 participantsModerate
Intervention NR
Major cardiovascular events · adults with chronic kidney disease
HMG CoA reductase inhibitors (statins) for dialysis patients (2013) · Cochrane
RR 0.95 [0.88, 1.03]4 studies · 7804 participantsHigh
Intervention NR
All‐cause mortality · adults with chronic kidney disease
HMG CoA reductase inhibitors (statins) for dialysis patients (2013) · Cochrane
RR 0.96 [0.9, 1.02]13 studies · 4705 participantsModerate
Intervention NR
Cardiovascular mortality · adults with chronic kidney disease
HMG CoA reductase inhibitors (statins) for dialysis patients (2013) · Cochrane
RR 0.94 [0.84, 1.06]13 studies · 4627 participantsModerate
Pre‐emptive medication for cytomegalovirus (CMV) viraemia vs placebo/no treatment
All symptomatic CMV disease · solid organ transplant recipients with CMV viraemia
Pre‐emptive treatment for cytomegalovirus viraemia to prevent cytomegalovirus disease in solid organ… (2013) · Cochrane
no estimate extracted6 studies · 288 participantsLow
Pre‐emptive medication vs prophylaxis
Acute rejection · solid organ transplant recipients with CMV viraemia
Pre‐emptive treatment for cytomegalovirus viraemia to prevent cytomegalovirus disease in solid organ… (2013) · Cochrane
no estimate extracted6 studies · 693 participantsLow
Pre‐emptive medication vs prophylaxis
Leucopenia · solid organ transplant recipients with CMV viraemia
Pre‐emptive treatment for cytomegalovirus viraemia to prevent cytomegalovirus disease in solid organ… (2013) · Cochrane
no estimate extracted6 studies · 729 participantsModerate
Pre‐emptive medication vs prophylaxis
D+/R‐ serostatus: symptomatic CMV · solid organ transplant recipients with CMV viraemia
Pre‐emptive treatment for cytomegalovirus viraemia to prevent cytomegalovirus disease in solid organ… (2013) · Cochrane
no estimate extracted2 studies · 39 participantsVery low
Pre‐emptive medication vs prophylaxis
D+ or D‐/R+ serostatus: symptomatic CMV · solid organ transplant recipients with CMV viraemia
Pre‐emptive treatment for cytomegalovirus viraemia to prevent cytomegalovirus disease in solid organ… (2013) · Cochrane
no estimate extracted2 studies · 93 participantsVery low
Pre‐emptive medication for cytomegalovirus (CMV) viraemia vs placebo/no treatment
CMV organ involvement · solid organ transplant recipients with CMV viraemia
Pre‐emptive treatment for cytomegalovirus viraemia to prevent cytomegalovirus disease in solid organ… (2013) · Cochrane
no estimate extracted5 studies · 217 participantsLow
Pre‐emptive medication for cytomegalovirus (CMV) viraemia vs placebo/no treatment
Acute rejection · solid organ transplant recipients with CMV viraemia
Pre‐emptive treatment for cytomegalovirus viraemia to prevent cytomegalovirus disease in solid organ… (2013) · Cochrane
no estimate extracted3 studies · 185 participantsLow
Pre‐emptive medication for cytomegalovirus (CMV) viraemia vs placebo/no treatment
All‐cause mortality · solid organ transplant recipients with CMV viraemia
Pre‐emptive treatment for cytomegalovirus viraemia to prevent cytomegalovirus disease in solid organ… (2013) · Cochrane
no estimate extracted3 studies · 176 participantsLow
Pre‐emptive medication for cytomegalovirus (CMV) viraemia vs placebo/no treatment
Graft loss · solid organ transplant recipients with CMV viraemia
Pre‐emptive treatment for cytomegalovirus viraemia to prevent cytomegalovirus disease in solid organ… (2013) · Cochrane
no estimate extracted1 study · 36 participantsVery low
Pre‐emptive medication for cytomegalovirus (CMV) viraemia vs placebo/no treatment
Leucopenia · solid organ transplant recipients with CMV viraemia
Pre‐emptive treatment for cytomegalovirus viraemia to prevent cytomegalovirus disease in solid organ… (2013) · Cochrane
no estimate extracted2 studies · 114 participantsLow
Pre‐emptive medication vs prophylaxis
All symptomatic CMV disease · solid organ transplant recipients with CMV viraemia
Pre‐emptive treatment for cytomegalovirus viraemia to prevent cytomegalovirus disease in solid organ… (2013) · Cochrane
no estimate extracted7 studies · 753 participantsLow
Pre‐emptive medication vs prophylaxis
All‐cause mortality · solid organ transplant recipients with CMV viraemia
Pre‐emptive treatment for cytomegalovirus viraemia to prevent cytomegalovirus disease in solid organ… (2013) · Cochrane
no estimate extracted7 studies · 753 participantsLow
Pre‐emptive medication vs prophylaxis
Graft loss · solid organ transplant recipients with CMV viraemia
Pre‐emptive treatment for cytomegalovirus viraemia to prevent cytomegalovirus disease in solid organ… (2013) · Cochrane
no estimate extracted7 studies · 753 participantsLow
Summary of findings: Tripterygium wilfordii Hook F (TwHF) vs no TwHF
Complete remission ( · patients with primary nephrotic syndrome
Tripterygium wilfordii Hook F (a traditional Chinese medicine) for primary nephrotic syndrome (2013) · Cochrane
RR 1.46 [1.18, 1.8]4 studies · 293 participantsLow
Summary of findings: Tripterygium wilfordii Hook F (TwHF) vs no TwHF
Partial remission ( · patients with primary nephrotic syndrome
Tripterygium wilfordii Hook F (a traditional Chinese medicine) for primary nephrotic syndrome (2013) · Cochrane
RR 0.77 [0.49, 1.21]4 studies · 293 participantsLow
Summary of findings: Tripterygium wilfordii Hook F (TwHF) vs no TwHF
Complete or partial remission ( · patients with primary nephrotic syndrome
Tripterygium wilfordii Hook F (a traditional Chinese medicine) for primary nephrotic syndrome (2013) · Cochrane
RR 1.26 [1.1, 1.44]4 studies · 293 participantsLow
Summary of findings: Tripterygium wilfordii Hook F vs prednisone
Complete remission ( · patients with primary nephrotic syndrome
Tripterygium wilfordii Hook F (a traditional Chinese medicine) for primary nephrotic syndrome (2013) · Cochrane
RR 1.09 [0.83, 1.43]4 studies · 223 participantsLow
Summary of findings: Tripterygium wilfordii Hook F vs prednisone
Partial remission ( · patients with primary nephrotic syndrome
Tripterygium wilfordii Hook F (a traditional Chinese medicine) for primary nephrotic syndrome (2013) · Cochrane
RR 1.07 [0.69, 1.65]4 studies · 223 participantsLow
Summary of findings: Tripterygium wilfordii Hook F vs prednisone
Complete or partial remission ( · patients with primary nephrotic syndrome
Tripterygium wilfordii Hook F (a traditional Chinese medicine) for primary nephrotic syndrome (2013) · Cochrane
RR 1.05 [0.92, 1.2]4 studies · 223 participantsLow
Intervention NR
Complete remission ( · patients with primary nephrotic syndrome
Tripterygium wilfordii Hook F (a traditional Chinese medicine) for primary nephrotic syndrome (2013) · Cochrane
RR 1.06 [0.82, 1.37]2 studies · 114 participantsLow
Intervention NR
Partial remission ( · patients with primary nephrotic syndrome
Tripterygium wilfordii Hook F (a traditional Chinese medicine) for primary nephrotic syndrome (2013) · Cochrane
RR 1.02 [0.46, 2.29]2 studies · 114 participantsLow
Intervention NR
Complete or partial remission ( · patients with primary nephrotic syndrome
Tripterygium wilfordii Hook F (a traditional Chinese medicine) for primary nephrotic syndrome (2013) · Cochrane
RR 1.05 [0.9, 1.23]2 studies · 114 participantsLow
Tacrolimus vs cyclosporin
Mortality Mortality at latest · Lung transplant recipients
Tacrolimus versus cyclosporin as primary immunosuppression for lung transplant recipients (2013) · Cochrane
RR 1.06 [0.75, 1.49]3 studies · 413 participantsLow