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)

346 questions in 59 reviews · Vascular

current versions
No studies 346 · 100%Ungraded 0 · 0%Very low 0 · 0%Low 0 · 0%Moderate 0 · 0%High 0 · 0%

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
Clopidogrel vs placebo
Duration of hospital stay · people with ESRD receiving haemodialysis through an arteriovenous fistula
Medical adjuvant treatment to increase patency of arteriovenous fistulae and grafts (2021) · Cochrane
no estimate extractedNRNo studies
Sulphinpyrazone vs placebo
Duration of hospital stay · people with ESRD receiving haemodialysis through an arteriovenous fistula or arteriovenous graft
Medical adjuvant treatment to increase patency of arteriovenous fistulae and grafts (2021) · Cochrane
no estimate extractedNRNo studies
Sulphinpyrazone vs placebo
Number of related surgical or radiological interventions · people with ESRD receiving haemodialysis through an arteriovenous fistula or arteriovenous graft
Medical adjuvant treatment to increase patency of arteriovenous fistulae and grafts (2021) · Cochrane
no estimate extractedNRNo studies
Glyceryl trinitrate patch vs placebo
Duration of hospital stay · people with ESRD receiving haemodialysis through an arteriovenous fistula
Medical adjuvant treatment to increase patency of arteriovenous fistulae and grafts (2021) · Cochrane
no estimate extractedNRNo studies
Glyceryl trinitrate patch vs placebo
Number of related surgical or radiological interventions · people with ESRD receiving haemodialysis through an arteriovenous fistula
Medical adjuvant treatment to increase patency of arteriovenous fistulae and grafts (2021) · Cochrane
no estimate extractedNRNo studies
Aspirin vs placebo
Number of related surgical or radiological interventions · people with ESRD receiving haemodialysis through an arteriovenous fistula or graft
Medical adjuvant treatment to increase patency of arteriovenous fistulae and grafts (2021) · Cochrane
no estimate extractedNRNo studies
Ticlopidine vs placebo
Duration of hospital stay · people with ESRD receiving haemodialysis through an arteriovenous fistula or graft
Medical adjuvant treatment to increase patency of arteriovenous fistulae and grafts (2021) · Cochrane
no estimate extractedNRNo studies
Ticlopidine vs placebo
Number of related surgical or radiological interventions · people with ESRD receiving haemodialysis through an arteriovenous fistula or graft
Medical adjuvant treatment to increase patency of arteriovenous fistulae and grafts (2021) · Cochrane
no estimate extractedNRNo studies
Cilostazol vs pentoxifylline
Arterial revascularisation · intermittent claudication
Cilostazol for intermittent claudication (2021) · Cochrane
no estimate extractedNRNo studies
Cilostazol vs pentoxifylline
Amputation · intermittent claudication
Cilostazol for intermittent claudication (2021) · Cochrane
no estimate extractedNRNo studies
Cilostazol vs pentoxifylline
Cardiovascular event · intermittent claudication
Cilostazol for intermittent claudication (2021) · Cochrane
no estimate extractedNRNo studies
Radiofrequency ablation (RFA) vs mechanochemical ablation (MOCA)
Technical success (> 5 years) · people with GSV incompetence
Interventions for great saphenous vein incompetence (2021) · Cochrane
no estimate extractedNRNo studies
Radiofrequency ablation (RFA) vs mechanochemical ablation (MOCA)
Long‐term recurrence (≥ 5 years) · people with GSV incompetence
Interventions for great saphenous vein incompetence (2021) · Cochrane
no estimate extractedNRNo studies
Alpha blockers vs placebo
QoL · primary Raynaud's phenomenon
Vasodilators for primary Raynaud's phenomenon (2021) · Cochrane
no estimate extractedNRNo studies
Alpha blockers vs placebo
RCS · primary Raynaud's phenomenon
Vasodilators for primary Raynaud's phenomenon (2021) · Cochrane
no estimate extractedNRNo studies
Prostagladin/prostacyclin analogues vs placebo
Duration of attacks · primary Raynaud's phenomenon
Vasodilators for primary Raynaud's phenomenon (2021) · Cochrane
no estimate extractedNRNo studies
Prostagladin/prostacyclin analogues vs placebo
QoL · primary Raynaud's phenomenon
Vasodilators for primary Raynaud's phenomenon (2021) · Cochrane
no estimate extractedNRNo studies
Prostagladin/prostacyclin analogues vs placebo
RCS · primary Raynaud's phenomenon
Vasodilators for primary Raynaud's phenomenon (2021) · Cochrane
no estimate extractedNRNo studies
Thromboxane synthase inhibitors vs placebo
Severity of attacks · primary Raynaud's phenomenon
Vasodilators for primary Raynaud's phenomenon (2021) · Cochrane
no estimate extractedNRNo studies
Thromboxane synthase inhibitors vs placebo
Duration of attacks · primary Raynaud's phenomenon
Vasodilators for primary Raynaud's phenomenon (2021) · Cochrane
no estimate extractedNRNo studies
Thromboxane synthase inhibitors vs placebo
QoL · primary Raynaud's phenomenon
Vasodilators for primary Raynaud's phenomenon (2021) · Cochrane
no estimate extractedNRNo studies
Thromboxane synthase inhibitors vs placebo
Adverse events · primary Raynaud's phenomenon
Vasodilators for primary Raynaud's phenomenon (2021) · Cochrane
no estimate extractedNRNo studies
Thromboxane synthase inhibitors vs placebo
RCS · primary Raynaud's phenomenon
Vasodilators for primary Raynaud's phenomenon (2021) · Cochrane
no estimate extractedNRNo studies
Selective serotonin reuptake inhibitors vs placebo
QoL · primary Raynaud's phenomenon
Vasodilators for primary Raynaud's phenomenon (2021) · Cochrane
no estimate extractedNRNo studies
Selective serotonin reuptake inhibitors vs placebo
RCS · primary Raynaud's phenomenon
Vasodilators for primary Raynaud's phenomenon (2021) · Cochrane
no estimate extractedNRNo studies
Nitrate/nitrate derivatives vs placebo
QoL · primary Raynaud's phenomenon
Vasodilators for primary Raynaud's phenomenon (2021) · Cochrane
no estimate extractedNRNo studies
Angiotensin‐converting enzyme inhibitors vs placebo
QoL · primary Raynaud's phenomenon
Vasodilators for primary Raynaud's phenomenon (2021) · Cochrane
no estimate extractedNRNo studies
Phosphodiesterase inhibitors vs placebo
QoL · primary Raynaud's phenomenon
Vasodilators for primary Raynaud's phenomenon (2021) · Cochrane
no estimate extractedNRNo studies
Angiotensin‐converting enzyme inhibitors vs placebo
RCS · primary Raynaud's phenomenon
Vasodilators for primary Raynaud's phenomenon (2021) · Cochrane
no estimate extractedNRNo studies
Compression stockings vs compression stockings
Quality of life · people with varicose veins without venous ulceration
Graduated compression stockings for the initial treatment of varicose veins in people without venous… (2021) · Cochrane
no estimate extractedNRNo studies
Propionyl‐L‐carnitine vs L‐carnitine
Progression of disease (to Fontaine stage III or IV or necessity for intervention (endovascular or surgery)) · people with intermittent claudication
Propionyl‐L‐carnitine for intermittent claudication (2021) · Cochrane
no estimate extractedNRNo studies
Propionyl‐L‐carnitine vs L‐carnitine
Side effects of propionyl‐L‐carnitine regimen · people with intermittent claudication
Propionyl‐L‐carnitine for intermittent claudication (2021) · Cochrane
no estimate extractedNRNo studies
Propionyl‐L‐carnitine vs L‐carnitine
Ankle brachial index · people with intermittent claudication
Propionyl‐L‐carnitine for intermittent claudication (2021) · Cochrane
no estimate extractedNRNo studies
Propionyl‐L‐carnitine vs L‐carnitine
Quality of life · people with intermittent claudication
Propionyl‐L‐carnitine for intermittent claudication (2021) · Cochrane
no estimate extractedNRNo studies
Extensive tests vs tests at the physician's discretion
All‐cause mortality1 · people with unprovoked VTE
Effect of testing for cancer on cancer‐ or venous thromboembolism (VTE)‐related mortality and morbidity in… (2021) · Cochrane
no estimate extractedNRNo studies
Standard testing plus PET/CT scanning vs standard testing alone
VTE‐related mortality4 · people with unprovoked VTE
Effect of testing for cancer on cancer‐ or venous thromboembolism (VTE)‐related mortality and morbidity in… (2021) · Cochrane
no estimate extractedNRNo studies
Extensive tests vs tests at the physician's discretion
VTE‐related mortality4 · people with unprovoked VTE
Effect of testing for cancer on cancer‐ or venous thromboembolism (VTE)‐related mortality and morbidity in… (2021) · Cochrane
no estimate extractedNRNo studies
Extensive tests vs tests at the physician's discretion
VTE‐related morbidity5 · people with unprovoked VTE
Effect of testing for cancer on cancer‐ or venous thromboembolism (VTE)‐related mortality and morbidity in… (2021) · Cochrane
no estimate extractedNRNo studies
Sclerotherapy (polidocanol) vs sclerotherapy (any sclerosant)
Recurrence · people with telangiectasias and reticular veins
Treatment for telangiectasias and reticular veins (2021) · Cochrane
no estimate extractedNRNo studies
Sclerotherapy (polidocanol) vs sclerotherapy (any sclerosant)
Time to resolution · people with telangiectasias and reticular veins
Treatment for telangiectasias and reticular veins (2021) · Cochrane
no estimate extractedNRNo studies
Sclerotherapy (polidocanol) vs sclerotherapy (any sclerosant)
Quality of life · people with telangiectasias and reticular veins
Treatment for telangiectasias and reticular veins (2021) · Cochrane
no estimate extractedNRNo studies
Sclerotherapy (STS) vs sclerotherapy (any sclerosant)
Recurrence · people with telangiectasias and reticular veins
Treatment for telangiectasias and reticular veins (2021) · Cochrane
no estimate extractedNRNo studies
Sclerotherapy (STS) vs sclerotherapy (any sclerosant)
Time to resolution · people with telangiectasias and reticular veins
Treatment for telangiectasias and reticular veins (2021) · Cochrane
no estimate extractedNRNo studies
Sclerotherapy (STS) vs sclerotherapy (any sclerosant)
Quality of life · people with telangiectasias and reticular veins
Treatment for telangiectasias and reticular veins (2021) · Cochrane
no estimate extractedNRNo studies
Sclerotherapy (hypertonic saline) vs sclerotherapy (any sclerosant)
Recurrence · people with telangiectasias and reticular veins
Treatment for telangiectasias and reticular veins (2021) · Cochrane
no estimate extractedNRNo studies
Sclerotherapy (hypertonic saline) vs sclerotherapy (any sclerosant)
Time to resolution · people with telangiectasias and reticular veins
Treatment for telangiectasias and reticular veins (2021) · Cochrane
no estimate extractedNRNo studies
Sclerotherapy (hypertonic saline) vs sclerotherapy (any sclerosant)
Quality of life · people with telangiectasias and reticular veins
Treatment for telangiectasias and reticular veins (2021) · Cochrane
no estimate extractedNRNo studies
Sclerotherapy (chromated glycerin) vs sclerotherapy (any sclerosant)
Recurrence · people with telangiectasias and reticular veins
Treatment for telangiectasias and reticular veins (2021) · Cochrane
no estimate extractedNRNo studies
Sclerotherapy (chromated glycerin) vs sclerotherapy (any sclerosant)
Time to resolution · people with telangiectasias and reticular veins
Treatment for telangiectasias and reticular veins (2021) · Cochrane
no estimate extractedNRNo studies
Sclerotherapy (chromated glycerin) vs sclerotherapy (any sclerosant)
Quality of life · people with telangiectasias and reticular veins
Treatment for telangiectasias and reticular veins (2021) · Cochrane
no estimate extractedNRNo studies