What are lagging safety indicators?
Lagging safety indicators describe outcomes that have already occurred, such as injuries, occupational illnesses, lost-time cases, and workers’ compensation costs. They help managers review past safety performance and identify patterns. Because low injury counts can reflect chance or underreporting, these indicators should be combined with measures of preventive activities.
Key facts
- Lagging indicators describe past outcomes.
- Examples include injury frequency and severity, lost-time injuries, and workers’ compensation costs.
- A low injury rate does not establish that hazards are absent.
What can these indicators reveal?
Counts, rates, and lost-time measures describe different aspects of past outcomes. EU-OSHA lists lost-time injuries and production days lost to sickness absence among the measures used to review earlier safety performance.
What can they miss?
NIOSH notes that companies with few injuries may not have enough information to identify trends. Underreporting and chance can also produce low rates, so injury outcomes alone say little about underlying causes.
Frequently asked questions
Is LTIFR a lagging indicator?
Yes. It counts injuries that have already occurred, and EU-OSHA lists lost-time injuries among lagging indicators.
Does an improving injury rate prove prevention is effective?
Not by itself. Review preventive activities alongside outcomes, because low rates can have explanations other than effective hazard control.
Sources
- What Measures Can Companies Use to Evaluate Safety Management Practices and Identify Opportunities for Improvement?, National Institute for Occupational Safety and Health (accessed October 28, 2026)
- Key performance indicators, European Agency for Safety and Health at Work (OSHwiki) (accessed October 28, 2026)
- Health and Safety Programs - Leading and Lagging Indicators, Canadian Centre for Occupational Health and Safety (accessed October 28, 2026)
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