Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,228 questions · 1,245 findings · 383 reviews

No studies found 403 · 32.4%GRADE not reported 128 · 10.3%Very low 385 · 30.9%Low 232 · 18.6%Moderate 81 · 6.5%High 16 · 1.3%

Acupuncture vs sham

Adverse events · Adults with dry mouth due to radiotherapy (head and neck cancer) or Sjogren's Syndrome
1 finding from 1 review

Prophylactic systemic antibiotics (amoxicillin) vs placebo or no antibiotic

Adverse events · Adults undergoing dental implant placement

Prophylactic systemic antibiotics (amoxicillin) showed no clear difference in adverse events compared with no antibiotics or placebo; GRADE not reported.

1 finding from 1 review

Acetaminophen plus Diphenhydrammine vs placebo (Unit of randomisation: transfusion)

Adverse events · patients with requirement of prophylaxis to avoid allergic and febrile non‐haemolytic transfusion reactions

Acetaminophen plus Diphenhydrammine led to lower adverse events compared with placebo (Unit of randomisation: transfusion); GRADE not reported.

1 finding from 1 review

Acetaminophen plus Diphenhydramine vs placebo

Adverse events · patients with requirement of prophylaxis to avoid allergic and febrile non‐haemolytic transfusion reactions

Acetaminophen plus Diphenhydramine led to lower adverse events compared with placebo; GRADE not reported.

1 finding from 1 review

Calcitonin (salmon calcitonin nasal spray 200 IU/day) vs placebo

Adverse events · Patients with histologically confirmed CGCG in one or both jaws and normal serum calcium and parathyroid hormone (PTH) levels
1 finding from 1 review
  • Adverse events were not described separately for each group. Trialists reported that adverse events were in most patients minimal and consisted of nausea, flushes and some dizziness. One patient had diarrhoea which…
    1 study · 14 participants
    GRADE not reported

Induced hypertension vs placebo or no intervention

Proportion of participants with ≥ 1 serious adverse events · people with acute subarachnoid haemorrhage

It is very uncertain whether induced hypertension changes proportion of participants with ≥ 1 serious adverse events compared with placebo or no intervention (very low certainty).

1 finding from 1 review

Band ligation vs no intervention or a sham procedure

Serious adverse events Idiopathic thrombocytopaenic purpura · children with portal hypertension and large oesophageal varices, without previous gastrointestinal bleeding or beta‐blocker treatment

It is very uncertain whether band ligation changes serious adverse events Idiopathic thrombocytopaenic purpura compared with sham or no intervention (very low certainty).

1 finding from 1 review

Tonsillectomy vs no intervention

Proportion of participants with adverse events and severe adverse events · people with chronic plaque psoriasis

It is very uncertain whether tonsillectomy changes proportion of participants with adverse events and severe adverse… compared with no intervention (very low certainty).

1 finding from 1 review

Sclerotherapy vs no intervention

Serious adverse events and liver‐related morbidity: incidence of gastric varices · primary prophylaxis of oesophageal variceal bleeding in children with chronic liver disease or portal vein thrombosis

It is very uncertain whether sclerotherapy changes serious adverse events and liver‐related morbidity: incidence of… compared with no intervention (very low certainty).

1 finding from 1 review