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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
Intervention NR
Participant‐reported postoperative pain intensity measured on continuous scales · adults undergoing open heart surgery
Psychological interventions for acute pain after open heart surgery (2017) · Cochrane
no estimate extracted2 studies · 104 participantsLow
Intervention NR
Analgesic use measured via PCA · adults undergoing open heart surgery
Psychological interventions for acute pain after open heart surgery (2017) · Cochrane
no estimate extracted2 studies · 104 participantsLow
Intervention NR
Mental distress · adults undergoing open heart surgery
Psychological interventions for acute pain after open heart surgery (2017) · Cochrane
no estimate extracted1 study · 74 participantsLow
Intervention NR
Mobility · adults undergoing open heart surgery
Psychological interventions for acute pain after open heart surgery (2017) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Time to extubation · adults undergoing open heart surgery
Psychological interventions for acute pain after open heart surgery (2017) · Cochrane
no estimate extracted2 studies · 154 participantsLow
Intervention NR
Number of participants with self‐reported pain intensity reduction of at least 50% from baseline · adults undergoing open heart surgery
Psychological interventions for acute pain after open heart surgery (2017) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Number of participants below 30/100 mm on the visual analogue scale (VAS) in self‐reported postoperative pain intensity · adults undergoing open heart surgery
Psychological interventions for acute pain after open heart surgery (2017) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Health‐related quality of life (HRQOL), SD units: measured on FACIT‐Pal, TOI of FACT‐Hep, TOI of FACT‐L, FACT‐G, McGill Quality of Life, FACIT‐Sp. Higher scores indicate better HRQOL. · patients with advanced cancer
Early palliative care for adults with advanced cancer (2017) · Cochrane
no estimate extracted7 studies · 1028 participantsLow
Intervention NR
Health‐related quality of life (HRQOL), natural units: measured on FACT‐G (from 0 to 108) · patients with advanced cancer
Early palliative care for adults with advanced cancer (2017) · Cochrane
no estimate extracted7 studies · 1028 participantsLow
Intervention NR
Survival: estimated with the unadjusted death hazard ratio · patients with advanced cancer
Early palliative care for adults with advanced cancer (2017) · Cochrane
HR 0.854 studies · 800 participantsVery low
Intervention NR
Depression, SD units: measured on CES‐D, HADS‐D, PHQ‐9. Higher scores indicate higher depressive symptom load. · patients with advanced cancer
Early palliative care for adults with advanced cancer (2017) · Cochrane
no estimate extracted5 studies · 762 participantsVery low
Intervention NR
Depression, natural units: measured on CES‐D (from 0 to 60). Higher scores indicate higher depressive symptom load · patients with advanced cancer
Early palliative care for adults with advanced cancer (2017) · Cochrane
no estimate extracted5 studies · 762 participantsVery low
Intervention NR
Symptom intensity, SD units: measured on ESAS, QUAL‐E Symptom Impact Subscale, SDS, RSC, LCS of FACT‐L, HCS of FACT‐Hep. Higher scores indicate higher symptom intensity. · patients with advanced cancer
Early palliative care for adults with advanced cancer (2017) · Cochrane
no estimate extracted7 studies · 1054 participantsLow
Intervention NR
Symptom intensity, natural units: measured on ESAS (from 0 to 900). · patients with advanced cancer
Early palliative care for adults with advanced cancer (2017) · Cochrane
no estimate extracted7 studies · 1054 participantsLow
Intervention NR
Adverse events · patients with advanced cancer
Early palliative care for adults with advanced cancer (2017) · Cochrane
no estimate extracted7 studies · 1614 participantsUngraded
Summary of findings: liposomal bupivacaine vs placebo
Cumulative pain score from the end of operation (0 hours) to 72 hours (NRS 0 to 10) · aged 18 years and older undergoing elective surgery at any surgical site
Liposomal bupivacaine infiltration at the surgical site for the management of postoperative pain (2017) · Cochrane
no estimate extracted1 study · 189 participantsVery low
Summary of findings: liposomal bupivacaine vs bupivacaine hydrochloride
Mean pain score at 12, 24, 48, 72 and 96 hours following surgery (NRS 0 to 10) · aged 18 years and older undergoing elective surgery at any surgical site
Liposomal bupivacaine infiltration at the surgical site for the management of postoperative pain (2017) · Cochrane
no estimate extracted1 study · 134 participantsVery low
Summary of findings: liposomal bupivacaine vs bupivacaine hydrochloride
Time to first postoperative opioid dose over initial 72 hours · aged 18 years and older undergoing elective surgery at any surgical site
Liposomal bupivacaine infiltration at the surgical site for the management of postoperative pain (2017) · Cochrane
no estimate extractedNRNo studies
Summary of findings: liposomal bupivacaine vs bupivacaine hydrochloride
Total postoperative opioid consumption over first 72 hours · aged 18 years and older undergoing elective surgery at any surgical site
Liposomal bupivacaine infiltration at the surgical site for the management of postoperative pain (2017) · Cochrane
no estimate extracted1 study · 134 participantsVery low
Summary of findings: liposomal bupivacaine vs bupivacaine hydrochloride
Percentage of participants not requiring postoperative opioids over initial 72 hours · aged 18 years and older undergoing elective surgery at any surgical site
Liposomal bupivacaine infiltration at the surgical site for the management of postoperative pain (2017) · Cochrane
no estimate extracted1 study · 134 participantsVery low
Summary of findings: liposomal bupivacaine vs bupivacaine hydrochloride
Incidence of adverse events within 30 days of surgery · aged 18 years and older undergoing elective surgery at any surgical site
Liposomal bupivacaine infiltration at the surgical site for the management of postoperative pain (2017) · Cochrane
no estimate extracted3 studies · 583 participantsModerate
Summary of findings: liposomal bupivacaine vs placebo
Serious adverse events · aged 18 years and older undergoing elective surgery at any surgical site
Liposomal bupivacaine infiltration at the surgical site for the management of postoperative pain (2017) · Cochrane
no estimate extracted2 studies · 382 participantsLow
Summary of findings: liposomal bupivacaine vs placebo
Mean pain score at 12, 24, 48, 72 and 96 hours following surgery (NRS 0 to 10) · aged 18 years and older undergoing elective surgery at any surgical site
Liposomal bupivacaine infiltration at the surgical site for the management of postoperative pain (2017) · Cochrane
no estimate extractedNRNo studies
Summary of findings: liposomal bupivacaine vs placebo
Time to first postoperative opioid dose over initial 72 hours · aged 18 years and older undergoing elective surgery at any surgical site
Liposomal bupivacaine infiltration at the surgical site for the management of postoperative pain (2017) · Cochrane
no estimate extracted2 studies · 382 participantsLow
Summary of findings: liposomal bupivacaine vs placebo
Total postoperative opioid consumption over first 72 hours · aged 18 years and older undergoing elective surgery at any surgical site
Liposomal bupivacaine infiltration at the surgical site for the management of postoperative pain (2017) · Cochrane
no estimate extracted1 study · 189 participantsVery low
Summary of findings: liposomal bupivacaine vs placebo
Percentage of participants not requiring postoperative opioids over initial 72 hours · aged 18 years and older undergoing elective surgery at any surgical site
Liposomal bupivacaine infiltration at the surgical site for the management of postoperative pain (2017) · Cochrane
no estimate extracted2 studies · 382 participantsVery low
Summary of findings: liposomal bupivacaine vs placebo
Incidence of adverse events within 30 days of surgery · aged 18 years and older undergoing elective surgery at any surgical site
Liposomal bupivacaine infiltration at the surgical site for the management of postoperative pain (2017) · Cochrane
no estimate extracted2 studies · 382 participantsLow
Summary of findings: liposomal bupivacaine vs bupivacaine hydrochloride
Cumulative pain score from the end of operation (0 hours) to 72 hours (NRS 0 to 10) · aged 18 years and older undergoing elective surgery at any surgical site
Liposomal bupivacaine infiltration at the surgical site for the management of postoperative pain (2017) · Cochrane
no estimate extracted2 studies · 379 participantsVery low
Summary of findings: liposomal bupivacaine vs bupivacaine hydrochloride
Serious adverse events · aged 18 years and older undergoing elective surgery at any surgical site
Liposomal bupivacaine infiltration at the surgical site for the management of postoperative pain (2017) · Cochrane
no estimate extracted3 studies · 583 participantsModerate
Morphine vs placebo
Reported outcomes approximating to 30% reduction in pain · adults with neuropathic pain (any origin)
Morphine for chronic neuropathic pain in adults (2017) · Cochrane
no estimate extracted62 participantsVery low
Morphine vs placebo
At least 50% reduction in pain · adults with neuropathic pain (any origin)
Morphine for chronic neuropathic pain in adults (2017) · Cochrane
no estimate extracted62 participantsVery low
Morphine vs placebo
PGIC much or very much improved · adults with neuropathic pain (any origin)
Morphine for chronic neuropathic pain in adults (2017) · Cochrane
no estimate extracted1 study · 32 participantsVery low
Morphine vs placebo
Any pain‐related outcome (moderate pain improvement) · adults with neuropathic pain (any origin)
Morphine for chronic neuropathic pain in adults (2017) · Cochrane
RD 0.27 [0.16, 0.38]4 studies · 263 participantsVery low
Morphine vs placebo
Serious adverse events · adults with neuropathic pain (any origin)
Morphine for chronic neuropathic pain in adults (2017) · Cochrane
no estimate extracted4 studies · 289 participantsVery low
Morphine vs placebo
Death · adults with neuropathic pain (any origin)
Morphine for chronic neuropathic pain in adults (2017) · Cochrane
no estimate extracted4 studies · 289 participantsVery low
Morphine vs placebo
Any adverse event · adults with neuropathic pain (any origin)
Morphine for chronic neuropathic pain in adults (2017) · Cochrane
no estimate extracted4 studies · 289 participantsVery low
Morphine vs placebo
All‐cause withdrawal · adults with neuropathic pain (any origin)
Morphine for chronic neuropathic pain in adults (2017) · Cochrane
RD 0.044 studies · 289 participantsVery low
Aspirin 1000 mg vs placebo
Pain‐free at 2 hours · adults with episodic tension‐type headache
Aspirin for acute treatment of episodic tension‐type headache in adults (2017) · Cochrane
no estimate extractedNRVery low
Aspirin 1000 mg vs placebo
Pain‐free at other time points (1, 4, 24 hours) · adults with episodic tension‐type headache
Aspirin for acute treatment of episodic tension‐type headache in adults (2017) · Cochrane
no estimate extractedNRVery low
Aspirin 1000 mg vs placebo
Pain‐free or mild pain at 2 hours · adults with episodic tension‐type headache
Aspirin for acute treatment of episodic tension‐type headache in adults (2017) · Cochrane
no estimate extracted1 study · 215 participantsVery low
Aspirin 1000 mg vs placebo
Use of rescue medication · adults with episodic tension‐type headache
Aspirin for acute treatment of episodic tension‐type headache in adults (2017) · Cochrane
no estimate extracted2 studies · 397 participantsLow
Aspirin 1000 mg vs placebo
Patient Global Evaluation at end of study · adults with episodic tension‐type headache
Aspirin for acute treatment of episodic tension‐type headache in adults (2017) · Cochrane
no estimate extracted2 studies · 397 participantsVery low
Aspirin 1000 mg vs placebo
Any adverse event · adults with episodic tension‐type headache
Aspirin for acute treatment of episodic tension‐type headache in adults (2017) · Cochrane
no estimate extracted3 studies · 723 participantsLow
Aspirin 1000 mg vs placebo
Specific adverse events · adults with episodic tension‐type headache
Aspirin for acute treatment of episodic tension‐type headache in adults (2017) · Cochrane
no estimate extracted4 studies · 767 participantsVery low
Aspirin 1000 mg vs placebo
Serious adverse events · adults with episodic tension‐type headache
Aspirin for acute treatment of episodic tension‐type headache in adults (2017) · Cochrane
no estimate extracted4 studies · 767 participantsVery low
TENS vs sham TENS
Post‐intervention pain intensity (VAS 0‐10) · adults with neuropathic pain
Transcutaneous electrical nerve stimulation (TENS) for neuropathic pain in adults (2017) · Cochrane
no estimate extracted5 studies · 207 participantsVery low
TENS vs sham TENS
Health related quality of life · adults with neuropathic pain
Transcutaneous electrical nerve stimulation (TENS) for neuropathic pain in adults (2017) · Cochrane
no estimate extractedNRNo studies
TENS vs sham TENS
Participant global impression of change · adults with neuropathic pain
Transcutaneous electrical nerve stimulation (TENS) for neuropathic pain in adults (2017) · Cochrane
no estimate extractedNRNo studies
TENS vs sham TENS
Analgesic medication use · adults with neuropathic pain
Transcutaneous electrical nerve stimulation (TENS) for neuropathic pain in adults (2017) · Cochrane
no estimate extractedNRNo studies
TENS vs sham TENS
Incidence/nature of adverse events · adults with neuropathic pain
Transcutaneous electrical nerve stimulation (TENS) for neuropathic pain in adults (2017) · Cochrane
no estimate extractedNRNo studies