Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

74 questions · 74 findings · 29 reviews

No studies found 25 · 33.8%GRADE not reported 2 · 2.7%Very low 39 · 52.7%Low 2 · 2.7%Moderate 5 · 6.8%High 1 · 1.4%

Intervention vs no intervention or control intervention (control)

Serious adverse events (number) ‐ pegylated interferon‐alpha plus ribavirin versus pegylated interferon‐alpha · people with acute hepatitis C infection

It is very uncertain whether intervention changes serious adverse events (proportion) ‐ pegylated interferon‐alpha… compared with no intervention or control intervention (control) (very low 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

Fexofenadine 120 mg/d vs placebo (1‐week intervention)

Primary outcome 2. Proportion of participants reporting adverse effects and serious adverse events throughout the study period · adults with eczema

Fexofenadine 120 mg/d showed no clear difference in primary outcome 2. Proportion of participants reporting adverse… compared with placebo (1‐week intervention) (moderate certainty).

1 finding from 1 review

Loratadine 10 mg vs placebo (4‐week intervention)

Primary outcome 2. Proportion of participants reporting adverse effects and serious adverse events throughout the study period · adults with eczema

Loratadine 10 mg/d showed no clear difference in primary outcome 2. Proportion of participants reporting adverse… compared with placebo (4‐week intervention) (low certainty).

1 finding from 1 review

Cetirizine 0.5 mg/kg/d vs placebo (18‐month intervention)

Primary outcome 2. Proportion of participants reporting adverse effects and serious adverse events throughout the study period · children with eczema

Cetirizine 0.5 mg/kg/d showed no clear difference in primary outcome 2. Proportion of participants reporting adverse… compared with placebo (18‐month intervention) (moderate certainty).

1 finding from 1 review

Cetirizine 10 mg/d vs placebo (4‐week intervention)

Primary outcome 2. Proportion of participants reporting adverse effects and serious adverse events throughout the study period · adults with eczema

Cetirizine 10 mg/d showed no clear difference in primary outcome 2. Proportion of participants reporting adverse… compared with placebo (4‐week intervention) (low certainty).

1 finding from 1 review

Higher vs lower FiO2 or targets of arterial oxygenation

Proportion of participants with 1 or more serious adverse events according to International Conference on Harmonisation Good Clinical Practice (ICH‐GCP) · adults admitted to the ICU

It is very uncertain whether higher changes proportion of participants with ≥ 1 serious adverse events according… compared with lower FiO2 or targets of arterial oxygenation (very low certainty).

1 finding from 1 review

Intervention not reported

There was no evidence of differences in the proportion of participants experiencing serious adverse events (for any of the comparisons Quality of evidence = very low1,2,3. · people undergoing liver resection
1 finding from 1 review

Intervention not reported

Adverse events, complications and morbidity associated with (adeno)tonsillectomy and comparators Expressed as the proportion of children experiencing a serious adverse event [7 months] · children with obstructive sleep‐disordered breathing
1 finding from 1 review

Intervention not reported

Withdrawal of methylphenidate due to non‐serious adverse events Measured by: proportion of participants withdrawn from treatment Average study duration (range): 5.60 months (0.6 months to 41 months) · children and adolescents aged 18 years and under diagnosed with ADHD
1 finding from 1 review

Intervention not reported

Withdrawal of methylphenidate due to serious adverse events (non‐comparative cohort studies) Measured by: proportion of participants withdrawn from treatment Average study duration (range): 7.9 months (1 month to 37 months) · children and adolescents aged 18 years and under diagnosed with ADHD
1 finding from 1 review