Findings
What do systematic reviews say? 4,721 questions · 19,640 findings · 2,039 reviews · Headline outcomes only
No studies found 3,754 · 19.1% GRADE not reported 1,273 · 6.5% Very low 4,859 · 24.7% Low 5,568 · 28.4% Moderate 3,240 · 16.5% High 946 · 4.8%
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Needle stick injuries · healthcare workers
Educational intervention showed no clear difference in needle stick injuries, questionnaires, 6 mo (RCT) compared with no intervention (low certainty).
1 finding from 1 review
RR 0.53 [0.21, 1.35]
167 participants
Low
evidence gaps · evidencegaps.com
Not clinical guidance. Data from the Cochrane Library (Summary of Findings tables and full text), PubMed and Crossref, extracted by the Evidence Gaps pipeline. Related-question groupings and the gap map key are proposals pending human validation. A review that found no studies, or no review at all, is not proof that no research exists.