Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

120 questions · 121 findings · 63 reviews

No studies found 14 · 11.6%GRADE not reported 4 · 3.3%Very low 30 · 24.8%Low 46 · 38%Moderate 22 · 18.2%High 5 · 4.1%

Cannabinoids vs placebo

Adverse event: gastrointestinal disorders at 1‐month (with actual · diagnosis of dementia (dementia in Alzheimer’s disease, vascular dementia, or mixed dementia; any severity

Comparison: cannabinoids showed no clear difference in adverse events ‐ gastrointestinal disorders ‐ total gastrointestinal… compared with placebo (low certainty).

1 finding from 1 review

Omega‐3 fatty acids and antioxidants vs standard diet or placebo

Study author‐reported adverse events · adults (aged 18 years or older), mechanically ventilated participants with ARDS as defined by the Berlin definition of ARDS or, for older…

It is very uncertain whether omega‐3 fatty acids and antioxidants changes total number of adverse events (study author reported anytime during… compared with placebo or standard nutrition (very low certainty).

1 finding from 1 review

Oestrogen cream vs other regimens

Adverse events (total adverse events) (oestrogen cream vs non‐hormonal lubricant gel) · postmenopausal women with vaginal atrophy

Oestrogen cream showed no clear difference in adverse events (total adverse events) (oestrogen cream vs… compared with other regimens (low certainty).

1 finding from 1 review

Preoperative education vs usual care

Total number of serious adverse events (infection, thrombosis, other serious adverse events · patients with knee replacement surgery

Preoperative education showed no clear difference in total number of serious adverse events (infection, thrombosis, other… compared with usual care (low certainty).

1 finding from 1 review

Preoperative education vs usual care

Total number of serious adverse events (infection, thrombosis, other serious adverse events · hip replacement

It is very uncertain whether preoperative education changes total number of serious adverse events (infection, thrombosis, other… compared with usual care (very low certainty).

1 finding from 1 review

Cipaglucosidase plus miglustat vs alglucosidase alfa plus placebo

Treatment‐related AEs: total treatment‐emergent adverse events potentially related to treatment · adults with LOPD

Cipaglucosidase plus miglustat showed no clear difference in treatment‐related AEs: total treatment‐emergent adverse events… compared with alglucosidase alfa plus placebo (low certainty).

1 finding from 1 review

Avalglucosidase alfa vs alglucosidase alfa

Treatment‐related AEs: total treatment‐emergent adverse events potentially related to treatment · adults with LOPD

Avalglucosidase alfa showed no clear difference in treatment‐related AEs: total treatment‐emergent adverse events… compared with alglucosidase alfa (low certainty).

1 finding from 1 review

Benzoyl peroxide vs salicylic acid

Adverse effect/event: 2. Adverse effects ‐ any ‐ medium‐termonly · participants with acne

It is very uncertain whether benzoyl peroxide changes total number of participants with any adverse events (medium‐term… compared with salicylic acid (very low certainty).

1 finding from 1 review

Benzoyl peroxide vs placebo or no treatment

Total number of participants with any adverse events (long‐term data) Treatment duration: range 10 weeks to 12 weeks · participants with acne

It is very uncertain whether benzoyl peroxide changes total number of participants with any adverse events (long‐term… compared with placebo or no treatment (very low certainty).

1 finding from 1 review

Benzoyl peroxide vs adapalene

Adverse event data · participants with acne

It is very uncertain whether benzoyl peroxide changes total number of participants with any adverse events (long‐term… compared with adapalene (very low certainty).

1 finding from 1 review

Benzoyl peroxide vs clindamycin

Total number of participants with any adverse events (long‐term data) Treatment duration: range 10 weeks to 12 weeks · participants with acne

Benzoyl peroxide showed no clear difference in total number of participants with any adverse events (long‐term… compared with clindamycin (moderate certainty).

1 finding from 1 review

Intervention not reported

Serious adverse events Measured by: proportion of serious adverse events (total) Average study duration (range): not stated · children and adolescents aged 18 years and under diagnosed with ADHD

It is very uncertain whether the intervention changes serious adverse events Measured by: proportion of serious adverse… (very low certainty).

1 finding from 1 review

Intramedullary fixation vs open reduction and internal fixation with plate

Adverse events ‐ total of adverse events (various: mainly infection; cosmetic result ‐ e.g. prominent metalwork ‐ and symptomatic hardware) · adults (aged ≥ 16 years) with acute middle third clavicle fractures

It is very uncertain whether intramedullary fixation changes adverse events ‐ total of adverse events (various: mainly infection;… compared with open reduction and internal fixation with plate (very low certainty).

1 finding from 1 review

Any cold therapy vs no cold therapy following total knee replacement

Adverse events Adverse events included discomfort, local skin reactions, superficial infections, cold induced injuries and thrombolytic events · people undergoing total knee replacement

It is very uncertain whether any cold therapy changes total adverse eventsAdverse events included discomfort, local skin… compared with no cold therapy following total knee replacement (very low certainty).

1 finding from 1 review