Factor · Safety

Motorcycle riding

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Systematic review and meta-analysis of helmet use and helmet laws to reduce mortality in adult motorcycle riders

Strong for helmet protection; insufficient for riding itself
Motorcycle ridingConfounding riskMeta-analysisObservational evidence
Systematic review & meta-analysis
Helmet use mortality OR ~0.48 in recent meta-analysis; other cohorts ~0.65
Causal status: Strong for helmet intervention; riding-vs-nonriding mortality effect not cleanly estimated
Reliability / bias notes: Confounding by riding behaviour, speed, alcohol, road exposure; helmet evidence often crash-conditioned
Ratnasekera et al. · 2025 · PMID 40462278
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