Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,918 questions · 5,537 findings · 1,803 reviews

No studies found 1,309 · 23.6%GRADE not reported 440 · 7.9%Very low 1,560 · 28.2%Low 1,292 · 23.3%Moderate 751 · 13.6%High 185 · 3.3%

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Fractional laser vs radiofrequency

Investigator‐assessed adverse events (short‐term) · people with acne scars

The review found no eligible studies for this question.

1 finding from 1 review

Sulfasalazine vs placebo

Withdrawals due to adverse events · Patients with ankylosing spondylitis

Sulfasalazine probably leads to higher total number of withdrawals due to adverse events compared with placebo (moderate certainty).

1 finding from 1 review

Methotrexate vs placebo

Withdrawals due to adverse events · children and young people with JIA

Methotrexate showed no clear difference in withdrawals due to adverse events (up to 6 months) compared with placebo (low certainty).

1 finding from 1 review

Angiotensin receptor blockers (ARBs) vs placebo

Number of participants reporting an adverse event · adults with early (stage 1 to 3) non‐diabetic CKD

It is very uncertain whether angiotensin receptor blockers changes adverse events (number reporting an adverse event) compared with placebo (very low certainty).

1 finding from 1 review

Radiotherapy vs botulinum toxin

Adverse events, reported as "negative experiences" · sialorrhea (excessive saliva) in people with motor neuron disease/amyotrophic lateral sclerosis

It is very uncertain whether radiotherapy changes adverse events, reported as "negative experiences" compared with botulinum toxin (very low certainty).

1 finding from 1 review

Calcineurin inhibitors ± steroids vs alkylating agents ± steroids

Malignancy · primary membranous nephropathy in adults with nephrotic syndrome

It is very uncertain whether calcineurin inhibitors ± steroids changes adverse events ‐ malignancy (range 30 to 36 months compared with alkylating agents ± steroids (very low certainty).

1 finding from 1 review

Chinese herbal medicine (CHM) + follicle aspiration + ovulation induction vs follicle aspiration + ovulation induction

OHSS · subfertile women with PCOS

It is very uncertain whether chinese herbal medicine (CHM) plus follicle aspiration plus… changes ovarian hyperstimulation syndrome (adverse events) compared with follicle aspiration plus ovulation induction (very low certainty).

1 finding from 1 review

Summary of findings table ‐ More time vs less time

Serious adverse events/death: medium‐term outcomes · rehabilitation (medium‐term outcomes)

It is very uncertain whether summary of findings table ‐ More time changes serious adverse events/death: medium‐term outcomes compared with less time (very low certainty).

1 finding from 1 review

Brain‐derived neurotrophic factor vs placebo

Participants with 1 or more serious adverse events · patients with Guillain‐Barré syndrome

It is very uncertain whether brain‐derived neurotrophic factor changes participants with 1 or more serious adverse events compared with placebo (very low certainty).

1 finding from 1 review

Cerebrospinal fluid filtration vs plasma exchange

Participants with 1 or more serious adverse events · patients with Guillain‐Barré syndrome

It is very uncertain whether cerebrospinal fluid filtration changes participants with 1 or more serious adverse events compared with plasma exchange (very low certainty).

1 finding from 1 review

Eculizumab vs placebo

Participants with 1 or more serious adverse events · adults with severe Guillain‐Barré syndrome (GBS disability score > 2), within 2 weeks form onset

Eculizumab showed no clear difference in participants with 1 or more serious adverse events compared with placebo (low certainty).

1 finding from 1 review

Interferon beta‐1a vs placebo

Participants with 1 or more serious adverse events · patients with Guillain‐Barré syndrome

It is very uncertain whether interferon beta‐1a changes participants with 1 or more serious adverse events compared with placebo (very low certainty).

1 finding from 1 review

Intervention not reported

Withdrawal from intervention due to adverse events · people with severe frostbite injuries
1 finding from 1 review

Intervention not reported

Withdrawal from intervention due to adverse events · people with severe frostbite injuries
1 finding from 1 review

Intervention not reported

Withdrawal from intervention due to adverse events · people with severe frostbite injuries
1 finding from 1 review