Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,337 questions · 1,354 findings · 566 reviews

No studies found 307 · 22.7%GRADE not reported 81 · 6%Very low 424 · 31.3%Low 310 · 22.9%Moderate 189 · 14%High 43 · 3.2%

Chondroitin vs placebo

Number of serious adverse events · patients with osteoarthritis

Chondroitin probably leads to lower number of serious adverse events compared with placebo (moderate certainty).

1 finding from 1 review

Intervention not reported

Serious adverse events at longest · hospitalised adults with COVID‐19 (moderate to severe disease)

The intervention showed no clear difference in serious adverse events at longest (low certainty).

1 finding from 1 review

Intervention not reported

Short‐term serious adverse events · people with rheumatoid arthritis

The review found no eligible studies for this question.

1 finding from 1 review

Valproate vs placebo

Serious adverse events by 6 weeks · people with agitation in dementia

It is very uncertain whether valproate preparations changes serious adverse events by 6 weeks compared with placebo (very low certainty).

1 finding from 1 review

Celecoxib vs NSAIDs

Short‐term serious adverse events · patients with rheumatoid arthritis

Celecoxib showed no clear difference in short‐term serious adverse events compared with traditional NSAIDs (low certainty).

1 finding from 1 review