Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,908 questions · 3,101 findings · 509 reviews

No studies found 571 · 18.4%GRADE not reported 358 · 11.5%Very low 723 · 23.3%Low 854 · 27.5%Moderate 489 · 15.8%High 106 · 3.4%

Aromatherapy vs placebo

Adverse events (common reactions to aromatherapy include skin rashes, dyspnoea, headache, cardiac arrhythmias, hypotension, hypertension or dizziness) · adults and children having any type of surgical procedure under general anaesthesia, regional anaesthesia or sedation, as hospital…

The review found no eligible studies for this question.

1 finding from 1 review

Peppermint vs placebo

Adverse events (common reactions to aromatherapy include skin rashes, dyspnoea, headache, cardiac arrhythmias, hypotension, hypertension or dizziness) · adults and children having any type of surgical procedure under general anaesthesia, regional anaesthesia or sedation, as hospital…

The review found no eligible studies for this question.

1 finding from 1 review

tDCS vs sham

Patient‐reported pain intensity or pain relief (VAS, NRS or categorical scale) · adults with chronic pain

It is very uncertain whether transcranial direct current stimulation (tDCS) changes pain intensity (0 to < 1 week postintervention) measured using… compared with sham (very low certainty).

1 finding from 1 review

Perioperative alcohol cessation intervention vs treatment

Postoperative complications after perioperative intervention (e.g. wound‐related complications, secondary surgery, cardiopulmonary complications, admission to intensive care) defined by need for treatment · adult surgical patients consuming 3 or more units of alcohol per day

Perioperative alcohol cessation intervention probably leads to lower postoperative complications after perioperative intervention (e.g.… compared with treatment (moderate certainty).

1 finding from 1 review