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)

1,751 questions in 147 reviews · Pain, Palliative and Supportive Care

current versions
No studies 361 · 20.6%Ungraded 87 · 5%Very low 625 · 35.7%Low 367 · 21%Moderate 232 · 13.2%High 79 · 4.5%

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
Hydromorphone vs morphine
Participant‐reported pain relief · people with moderate to severe cancer pain
Hydromorphone for cancer pain (2021) · Cochrane
RR 0.99 [0.84, 1.18]1 study · 233 participantsVery low
Summary of findings: complete control of vomiting during the overall phase (HEC) when vs treatment with aprepitant + granisetron
Interventions (corticosteroids included in all regimens)a · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extractedNRNo studies
Summary of findings: complete control of vomiting during the overall phase (HEC) when vs treatment with aprepitant + granisetron
casopitant + ondansetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted39 studies · 21642 participantsLow
Summary of findings: complete control of vomiting during the overall phase (HEC) when vs treatment with aprepitant + granisetron
rolapitant + granisetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted39 studies · 21642 participantsModerate
Summary of findings: complete control of vomiting during the overall phase (HEC) when vs treatment with aprepitant + granisetron
rolapitant + ondansetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted39 studies · 21642 participantsLow
Summary of findings: serious adverse events (HEC) when vs treatment with aprepitant + granisetron
Interventions (corticosteroids included in all regimens)a · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extractedNRNo studies
Summary of findings: serious adverse events (HEC) when vs treatment with aprepitant + granisetron
aprepitant + ondansetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted23 studies · 16065 participantsVery low
Summary of findings: serious adverse events (HEC) when vs treatment with aprepitant + granisetron
fosaprepitant + ondansetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted23 studies · 16065 participantsLow
Summary of findings: serious adverse events (HEC) when vs treatment with aprepitant + granisetron
casopitant + ondansetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted23 studies · 16065 participantsLow
Summary of findings: serious adverse events (HEC) when vs treatment with aprepitant + granisetron
netupitant + palonosetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted23 studies · 16065 participantsLow
Summary of findings: serious adverse events (HEC) when vs treatment with aprepitant + granisetron
aprepitant + ramosetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted23 studies · 16065 participantsVery low
Summary of findings: serious adverse events (HEC) when vs treatment with aprepitant + granisetron
fosaprepitant + palonosetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted23 studies · 16065 participantsVery low
Summary of findings: complete control of vomiting during the overall phase (HEC) when vs treatment with aprepitant + granisetron
fosnetupitant + palonosetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted39 studies · 21642 participantsModerate
Summary of findings: serious adverse events (HEC) when vs treatment with aprepitant + granisetron
fosnetupitant + palonosetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted23 studies · 16065 participantsVery low
Summary of findings: serious adverse events (HEC) when vs treatment with aprepitant + granisetron
fosaprepitant + granisetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted23 studies · 16065 participantsLow
Summary of findings: serious adverse events (HEC) when vs treatment with aprepitant + granisetron
aprepitant + palonosetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted23 studies · 16065 participantsVery low
Summary of findings: serious adverse events (HEC) when vs treatment with aprepitant + granisetron
rolapitant + granisetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted23 studies · 16065 participantsLow
Summary of findings: complete control of vomiting during the overall phase (MEC) when vs treatment with granisetron
Interventions (corticosteroids included in all regimens)a · adult cancer patients at risk for CINV caused by moderately emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extractedNRNo studies
Summary of findings: complete control of vomiting during the overall phase (MEC) when vs treatment with granisetron
aprepitant + palonosetron · adult cancer patients at risk for CINV caused by moderately emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted22 studies · 7800 participantsLow
Summary of findings: complete control of vomiting during the overall phase (MEC) when vs treatment with granisetron
netupitant + palonosetron · adult cancer patients at risk for CINV caused by moderately emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted22 studies · 7800 participantsLow
Summary of findings: complete control of vomiting during the overall phase (MEC) when vs treatment with granisetron
rolapitant + granisetron · adult cancer patients at risk for CINV caused by moderately emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted22 studies · 7800 participantsHigh
Summary of findings: complete control of vomiting during the overall phase (MEC) when vs treatment with granisetron
palonosetron · adult cancer patients at risk for CINV caused by moderately emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted22 studies · 7800 participantsLow
Summary of findings: complete control of vomiting during the overall phase (MEC) when vs treatment with granisetron
aprepitant + granisetron · adult cancer patients at risk for CINV caused by moderately emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted22 studies · 7800 participantsLow
Summary of findings: complete control of vomiting during the overall phase (HEC) when vs treatment with aprepitant + granisetron
aprepitant + palonosetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted39 studies · 21642 participantsLow
Summary of findings: complete control of vomiting during the overall phase (MEC) when vs treatment with granisetron
azasetron · adult cancer patients at risk for CINV caused by moderately emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted22 studies · 7800 participantsLow
Summary of findings: complete control of vomiting during the overall phase (MEC) when vs treatment with granisetron
fosaprepitant + ondansetron · adult cancer patients at risk for CINV caused by moderately emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted22 studies · 7800 participantsLow
Summary of findings: complete control of vomiting during the overall phase (MEC) when vs treatment with granisetron
aprepitant + ondansetron · adult cancer patients at risk for CINV caused by moderately emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted22 studies · 7800 participantsLow
Summary of findings: complete control of vomiting during the overall phase (MEC) when vs treatment with granisetron
casopitant + ondansetron · adult cancer patients at risk for CINV caused by moderately emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted22 studies · 7800 participantsLow
Summary of findings: complete control of vomiting during the overall phase (MEC) when vs treatment with granisetron
ondansetron · adult cancer patients at risk for CINV caused by moderately emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted22 studies · 7800 participantsLow
Summary of findings: serious adverse events (MEC) when vs treatment with granisetron
Interventions (corticosteroids included in all regimens)a · adult cancer patients at risk for CINV caused by moderately emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extractedNRNo studies
Summary of findings: serious adverse events (MEC) when vs treatment with granisetron
rolapitant + granisetron · adult cancer patients at risk for CINV caused by moderately emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted1 study · 1344 participantsLow
Summary of findings: complete control of vomiting during the overall phase (HEC) when vs treatment with aprepitant + granisetron
aprepitant + ramosetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted39 studies · 21642 participantsLow
Summary of findings: complete control of vomiting during the overall phase (HEC) when vs treatment with aprepitant + granisetron
fosaprepitant + palonosetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted39 studies · 21642 participantsLow
Summary of findings: complete control of vomiting during the overall phase (HEC) when vs treatment with aprepitant + granisetron
netupitant + palonosetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted39 studies · 21642 participantsHigh
Summary of findings: complete control of vomiting during the overall phase (HEC) when vs treatment with aprepitant + granisetron
fosaprepitant + granisetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted39 studies · 21642 participantsHigh
Summary of findings: complete control of vomiting during the overall phase (HEC) when vs treatment with aprepitant + granisetron
aprepitant + ondansetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted39 studies · 21642 participantsLow
Summary of findings: complete control of vomiting during the overall phase (HEC) when vs treatment with aprepitant + granisetron
fosaprepitant + ondansetron · adult cancer patients at risk for CINV caused by highly emetogenic chemotherapy
Antiemetics for adults for prevention of nausea and vomiting caused by moderately or highly emetogenic… (2021) · Cochrane
no estimate extracted39 studies · 21642 participantsLow
Intravenous ketorolac vs placebo
Number of participants with at least 50% pain relief over 4 hours · adults (mean study ages 23 to 67 years) with acute postoperative pain after abdominal/pelvic, dental or orthopedic…
Single‐dose intravenous ketorolac for acute postoperative pain in adults (2021) · Cochrane
RR 2.81 [1.8, 4.37]8 studies · 658 participantsVery low
Intravenous ketorolac vs another NSAID
Number of participants using rescue medication over 4 or 6 hours post interventions · adults (mean study ages 23 to 67 years) with acute postoperative pain after abdominal/pelvic, dental or orthopedic…
Single‐dose intravenous ketorolac for acute postoperative pain in adults (2021) · Cochrane
RR 0.9 [0.58, 1.4]3 studies · 260 participantsVery low
Intravenous ketorolac vs another NSAID
Number of participants reporting any adverse event · adults (mean study ages 23 to 67 years) with acute postoperative pain after abdominal/pelvic, dental or orthopedic…
Single‐dose intravenous ketorolac for acute postoperative pain in adults (2021) · Cochrane
RR 1.11 [1, 1.23]5 studies · 516 participantsModerate
Intravenous ketorolac vs another NSAID
Number of participants experiencing a serious adverse event · adults (mean study ages 23 to 67 years) with acute postoperative pain after abdominal/pelvic, dental or orthopedic…
Single‐dose intravenous ketorolac for acute postoperative pain in adults (2021) · Cochrane
RR 3.18 [0.13, 76.99]5 studies · 530 participantsLow
Intravenous ketorolac vs placebo
Number of participants with at least 50% pain relief over 6 hours · adults (mean study ages 23 to 67 years) with acute postoperative pain after abdominal/pelvic, dental or orthopedic…
Single‐dose intravenous ketorolac for acute postoperative pain in adults (2021) · Cochrane
RR 3.26 [1.93, 5.51]10 studies · 914 participantsLow
Intravenous ketorolac vs placebo
Median time to use of rescue medication · adults (mean study ages 23 to 67 years) with acute postoperative pain after abdominal/pelvic, dental or orthopedic…
Single‐dose intravenous ketorolac for acute postoperative pain in adults (2021) · Cochrane
no estimate extracted6 studies · 633 participantsModerate
Intravenous ketorolac vs placebo
Number of participants using rescue medication over 4 or 6 hours post‐interventions · adults (mean study ages 23 to 67 years) with acute postoperative pain after abdominal/pelvic, dental or orthopedic…
Single‐dose intravenous ketorolac for acute postoperative pain in adults (2021) · Cochrane
RR 0.6 [0.36, 1]5 studies · 417 participantsVery low
Intravenous ketorolac vs placebo
Number of participants reporting any adverse event · adults (mean study ages 23 to 67 years) with acute postoperative pain after abdominal/pelvic, dental or orthopedic…
Single‐dose intravenous ketorolac for acute postoperative pain in adults (2021) · Cochrane
RR 1.09 [1, 1.19]8 studies · 810 participantsModerate
Intravenous ketorolac vs placebo
Number of participants experiencing a serious adverse event · adults (mean study ages 23 to 67 years) with acute postoperative pain after abdominal/pelvic, dental or orthopedic…
Single‐dose intravenous ketorolac for acute postoperative pain in adults (2021) · Cochrane
RR 0.62 [0.13, 3.03]8 studies · 703 participantsLow
Intravenous ketorolac vs another NSAID
Number of participants with at least 50% pain relief over 4 hours · adults (mean study ages 23 to 67 years) with acute postoperative pain after abdominal/pelvic, dental or orthopedic…
Single‐dose intravenous ketorolac for acute postoperative pain in adults (2021) · Cochrane
RR 1.04 [0.89, 1.21]4 studies · 337 participantsLow
Intravenous ketorolac vs another NSAID
Number of participants with at least 50% pain relief over 6 hours · adults (mean study ages 23 to 67 years) with acute postoperative pain after abdominal/pelvic, dental or orthopedic…
Single‐dose intravenous ketorolac for acute postoperative pain in adults (2021) · Cochrane
RR 1.06 [0.95, 1.19]6 studies · 603 participantsModerate
Intravenous ketorolac vs another NSAID
Median time to use of rescue medication · adults (mean study ages 23 to 67 years) with acute postoperative pain after abdominal/pelvic, dental or orthopedic…
Single‐dose intravenous ketorolac for acute postoperative pain in adults (2021) · Cochrane
no estimate extracted4 studies · 427 participantsLow
Summary of Findings Table ‐ Ibuprofen vs Placebo
Number of participants with at least 50% pain relief at 4 hours · health problem or population
Single‐dose intravenous ibuprofen for acute postoperative pain in adults (2021) · Cochrane
RR 1.44 [0.77, 2.66]1 study · 126 participantsVery low