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Injury Indicators

This study aims to identify reliable measures (indicators) of injury occurrence that can be compared by person, place, and time. The objectives include defining an ideal indicator, addressing validity issues, analyzing existing indicators, and proposing a robust set of indicators.

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Injury Indicators

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  1. Injury Indicators Colin Cryer CHSS, University of Kent, England on behalf of the ICEII Group

  2. Aim • To identify robust measures (indicators) of injury occurrence (fatal and non-fatal) that can be compared by person, place (including internationally) and time.

  3. Example 1 • Target: • to reduce serious unintentional injury (sufficient to require a hospital stay of 4 or more days) by at least a tenth. • Concern: • injury indicator is not stable over time (or across geographic area)

  4. Example 2 • Target: • To reduce the rate of accidents - here being defined as those which involve a hospital visit or consultation with a family doctor - by at least a fifth. • Concerns • will focus attention on minor injury • ascertainment influenced by extraneous factors.

  5. Example 2 (contd.) • Evidence to support those concerns: • Cryer PC, et al. Why the Government was right to change the ‘Our Healthier Nation’ accidental injury target. Public Health 2000; 114: 232-7

  6. From Aim to Objectives Example 1 Example 2 Need for robust case definition for indicators Need for criteria for an ideal indicator

  7. Objectives • Identify the characteristics of an ideal indicator. • Agree robust definitions of a case that will be the basis of each indicator. • Identify problems that may compromise the validity of each proposed indicator and how they may be addressed. • Analysis of indicators in current use, and propose a robust set of indicators.

  8. Scope • Proposal: • To focus on occurrence of injury (initially) • Subsequently, focus on: • burden of injury • exposure to hazards • attributes relating to prevention

  9. Criteria for a sound indicator • Case definition: anatomical or physiological damage. • The injury cases ascertained should be important (eg. in terms of disablement and / or threat-to-life). • Cases should be ascertained from routinely or easily collected data. • The probability of a case being ascertained should be independent of extraneous factors. • The indicator should capture all the events in universe that the indicator aims to reflect.

  10. Discussion: • Criteria for a sound indicator • Case definition • Assess existing indicators • Identify problems • (Propose reliable indicators)

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