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)

1,590 questions in 129 reviews · Gynaecological, Neuro-oncology and Orphan Cancer

current versions
No studies 281 · 17.7%Ungraded 74 · 4.7%Very low 410 · 25.8%Low 420 · 26.4%Moderate 280 · 17.6%High 125 · 7.9%

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
LMWH prophylaxis vs UFH prophylaxis
Symptomatic DVT · People with cancer with perioperative thromboprophylaxis
Anticoagulation for perioperative thromboprophylaxis in people with cancer (2018) · Cochrane
RR 0.67 [0.27, 1.69]8 studies · 2250 participantsModerate
LMWH prophylaxis vs UFH prophylaxis
Symptomatic DVT measured as asymptomatic DVT · People with cancer with perioperative thromboprophylaxis
Anticoagulation for perioperative thromboprophylaxis in people with cancer (2018) · Cochrane
RR 0.86 [0.71, 1.05]12 studies · 4938 participantsLow
LMWH prophylaxis vs UFH prophylaxis
Major bleeding · People with cancer with perioperative thromboprophylaxis
Anticoagulation for perioperative thromboprophylaxis in people with cancer (2018) · Cochrane
RR 1.01 [0.69, 1.48]9 studies · 3473 participantsModerate
LMWH prophylaxis vs UFH prophylaxis
Minor bleeding · People with cancer with perioperative thromboprophylaxis
Anticoagulation for perioperative thromboprophylaxis in people with cancer (2018) · Cochrane
RR 1.01 [0.76, 1.33]2 studies · 1194 participantsModerate
LMWH prophylaxis vs UFH prophylaxis
Wound hematoma · People with cancer with perioperative thromboprophylaxis
Anticoagulation for perioperative thromboprophylaxis in people with cancer (2018) · Cochrane
RR 0.7 [0.54, 0.92]6 studies · 2827 participantsModerate
LMWH prophylaxis vs UFH prophylaxis
Reoperation for bleeding · People with cancer with perioperative thromboprophylaxis
Anticoagulation for perioperative thromboprophylaxis in people with cancer (2018) · Cochrane
RR 0.93 [0.57, 1.5]4 studies · 1246 participantsModerate
LMWH prophylaxis vs UFH prophylaxis
Intraoperative transfusion · People with cancer with perioperative thromboprophylaxis
Anticoagulation for perioperative thromboprophylaxis in people with cancer (2018) · Cochrane
no estimate extracted2 studies · 737 participantsLow
Exercise interventions vs usual care
Aerobic exercise tolerance (all cancers: 8 to 12 weeks of
Interventions for promoting habitual exercise in people living with and beyond cancer (2018) · Cochrane
no estimate extracted10 studies · 604 participantsLow
Exercise interventions vs usual care
Aerobic exercise tolerance (all cancers: 8 to 12 weeks of
Interventions for promoting habitual exercise in people living with and beyond cancer (2018) · Cochrane
no estimate extracted4 studies · 201 participantsLow
Exercise interventions vs usual care
Aerobic exercise tolerance (all cancers: 6 months)
Interventions for promoting habitual exercise in people living with and beyond cancer (2018) · Cochrane
no estimate extracted7 studies · 591 participantsLow
Exercise interventions vs usual care
Aerobic exercise tolerance (breast cancer: 8‐12 weeks of
Interventions for promoting habitual exercise in people living with and beyond cancer (2018) · Cochrane
no estimate extracted6 studies · 441 participantsVery low
Exercise interventions vs usual care
Aerobic exercise tolerance (all cancers: combination of supervised and home‐based exercise: 8 to 12 weeks of
Interventions for promoting habitual exercise in people living with and beyond cancer (2018) · Cochrane
no estimate extracted4 studies · 357 participantsVery low
Exercise interventions vs usual care
Aerobic exercise tolerance (all cancers: home‐based exercise: 8 to 12 weeks of
Interventions for promoting habitual exercise in people living with and beyond cancer (2018) · Cochrane
no estimate extracted3 studies · 155 participantsVery low
Exercise interventions vs usual care
Aerobic exercise tolerance (all cancers:supervised exercise: 8 to 12 weeks of
Interventions for promoting habitual exercise in people living with and beyond cancer (2018) · Cochrane
no estimate extracted3 studies · 92 participantsVery low
Moxibustion vs no treatment
The incidence and severity of toxicities: leukopenia (WHO grade 3 to 4) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
RR 0.5 [0.1, 2.56]1 study · 72 participantsLow
Moxibustion vs sham treatment
Patient‐reported symptom: nausea/vomiting (EORTC QLQ‐C30) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
no estimate extracted1 study · 50 participantsLow
Moxibustion vs sham treatment
Patient‐reported symptom: diarrhoea (EORTC QLQ‐C30) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
no estimate extracted1 study · 50 participantsLow
Moxibustion vs sham treatment
Objective outcome measure: WBC count (× 109/L) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
MD 1.72 [0.97, 2.47]1 study · 50 participantsLow
Moxibustion vs sham treatment
Objective outcome measure: haemoglobin (g/L) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
MD 2.06 [1.26, 2.86]1 study · 50 participantsLow
Moxibustion vs sham treatment
Objective outcome measure: platelets (× 109/L) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
MD 210.79 [167.02, 254.56]1 study · 50 participantsLow
Moxibustion vs conventional medicines
The incidence and severity of toxicities: haematological toxicity · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
RR 0.57 [0.15, 2.2]1 study · 72 participantsLow
Moxibustion vs conventional medicines
QoL (Karnofsky score) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
MD 6.7 [2.37, 11.03]1 study · 82 participantsLow
Moxibustion vs conventional medicines
Patient‐reported symptom: nausea/vomiting · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
no estimate extractedNRNo studies
Moxibustion vs conventional medicines
Patient‐reported symptom: diarrhoea · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
no estimate extractedNRNo studies
Moxibustion vs conventional medicines
Objective outcome measure: WBC count (× 109/L) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
MD 0.4 [0.15, 0.65]1 study · 90 participantsLow
Moxibustion vs no treatment
QoL · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
no estimate extractedNRNo studies
Moxibustion vs conventional medicines
Objective outcome measure: haemoglobin (g/L) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
MD 10.28 [4.51, 16.05]2 studies · 235 participantsLow
Moxibustion vs conventional medicines
Objective outcome measure: platelets (× 109/L) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
no estimate extracted2 studies · 210 participantsLow
Moxibustion + conventional treatment vs conventional medicine alone
The incidence and severity of toxicities: leukopenia (WHO grade 3 to 4) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
RR 0.14 [0.01, 2.64]1 study · 56 participantsLow
Moxibustion + conventional treatment vs conventional medicine alone
QoL (EORTC QLQ‐c30) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
MD 8.85 [4.25, 13.46]3 studies · 134 participantsLow
Moxibustion + conventional treatment vs conventional medicine alone
Patient‐reported symptom: nausea/vomiting (WHO grade 3 to 4) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
RR 0.43 [0.25, 0.74]7 studies · 801 participantsLow
Moxibustion + conventional treatment vs conventional medicine alone
Patient‐reported symptom: diarrhoea · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
RR 0.19 [0.01, 3.88]1 study · 61 participantsLow
Moxibustion + conventional treatment vs conventional medicine alone
Objective outcome measure: WBC count (× 109/L) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
no estimate extracted3 studies · 262 participantsLow
Moxibustion + conventional treatment vs conventional medicine alone
Objective outcome measure: haemoglobin (g/L) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
MD 3.97 [1.4, 6.53]2 studies · 142 participantsLow
Moxibustion + conventional treatment vs conventional medicine alone
Objective outcome measure: platelet (× 109/L) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
MD 13.482 studies · 142 participantsLow
Moxibustion vs no treatment
Patient‐reported symptom: nausea/vomiting · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
no estimate extractedNRNo studies
Moxibustion vs no treatment
Patient‐reported symptom: diarrhoea · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
no estimate extractedNRNo studies
Moxibustion vs no treatment
Objective outcome measure: WBC count (× 10‎9/L) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
MD 1.77 [0.76, 2.78]1 study · 80 participantsLow
Moxibustion vs no treatment
Objective outcome measure: haemoglobin (g/L) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
MD 1.33 [1.2, 1.46]1 study · 66 participantsLow
Moxibustion vs no treatment
Objective outcome measure: platelets (× 109/L) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
no estimate extractedNRNo studies
Moxibustion vs sham treatment
The incidence and severity of chemotherapy‐ or radiotherapy‐related toxicities · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
no estimate extractedNRNo studies
Moxibustion vs sham treatment
QoL (EORTC QLQ‐C30) · patients receiving chemotherapy or radiotherapy for cancer treatment
Moxibustion for alleviating side effects of chemotherapy or radiotherapy in people with cancer (2018) · Cochrane
MD 14.88 [4.83, 24.93]1 study · 50 participantsLow
Pharmacological intervention vs no intervention
Insufficiency fractures and avascular necrosis · Adults undergoing pelvic radiotherapy
Pharmacological interventions for the prevention of insufficiency fractures and avascular necrosis… (2018) · Cochrane
no estimate extracted905 participantsVery low
Pharmacological intervention vs no intervention
BMD and fracture risk · Adults undergoing pelvic radiotherapy
Pharmacological interventions for the prevention of insufficiency fractures and avascular necrosis… (2018) · Cochrane
no estimate extracted905 participantsVery low
Pharmacological intervention vs no intervention
Bone turnover markers · Adults undergoing pelvic radiotherapy
Pharmacological interventions for the prevention of insufficiency fractures and avascular necrosis… (2018) · Cochrane
no estimate extracted905 participantsVery low
Pharmacological intervention vs no intervention
QoL · Adults undergoing pelvic radiotherapy
Pharmacological interventions for the prevention of insufficiency fractures and avascular necrosis… (2018) · Cochrane
no estimate extracted905 participantsVery low
Pharmacological intervention vs no intervention
Mortality · Adults undergoing pelvic radiotherapy
Pharmacological interventions for the prevention of insufficiency fractures and avascular necrosis… (2018) · Cochrane
no estimate extracted905 participantsVery low
Pharmacological intervention vs no intervention
Adverse events · Adults undergoing pelvic radiotherapy
Pharmacological interventions for the prevention of insufficiency fractures and avascular necrosis… (2018) · Cochrane
no estimate extracted905 participantsVery low
Chemoradiotherapy vs radical surgery
Overall survival (5‐year) · women (18 years and older) diagnosed with stage IB2 cervical cancer
Type II or type III radical hysterectomy compared to chemoradiotherapy as a primary intervention for stage… (2018) · Cochrane
no estimate extractedNRVery low
Chemoradiotherapy vs radical surgery
Progression‐free survival (5‐year) · women (18 years and older) diagnosed with stage IB2 cervical cancer
Type II or type III radical hysterectomy compared to chemoradiotherapy as a primary intervention for stage… (2018) · Cochrane
no estimate extractedNRNo studies