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Margaret Warner, PhD Li-Hui Chen, MS, PhD Office of Analysis and Epidemiology National Conference on Health Statistics Washington, DC August 2010 International.

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Presentation on theme: "Margaret Warner, PhD Li-Hui Chen, MS, PhD Office of Analysis and Epidemiology National Conference on Health Statistics Washington, DC August 2010 International."— Presentation transcript:

1 Margaret Warner, PhD Li-Hui Chen, MS, PhD Office of Analysis and Epidemiology National Conference on Health Statistics Washington, DC August 2010 International comparisons of injury using the ICE indicators U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICES Centers for Disease Control and Prevention National Center for Health Statistics

2 What we’ll talk about…. International Collaborative Effort on Injury Statistics (ICE) criteria for indicators Barriers to comparability Coding rules Unspecified codes Global Injury Mortality Database Fatal injury indicators All injury Motor vehicle traffic Suicide Homicide Discussion

3 Desirable qualities of injury indicators: 1. Case Definition. The indicator should reflect the occurrence of injury satisfying some case definition of anatomical or physiological damage. 2. Serious Injury. The indicator should be based on events that are associated with significantly increased risk of impairment, functional limitation, disability or death, decreased quality of life, or increased cost (i.e. serious injury). 3. Case Ascertainment. The probability of a case being ascertained should be independent of social, economic and demographic factors, as well as service supply and access factors. The ICE on Injury Statistics criteria for indicators

4 Desirable qualities of injury indicators (con’t) 4. Representativeness. The indicator should be derived from data that are inclusive or representative of the target population that the indicator aims to reflect. 5. Data Availability. It should be possible to use existing data systems, or it should be practical to develop new systems, to provide data for computing the indicator. 6. Specification. The indicator should be fully specified to allow calculation to be consistent at any place and at any time. The ICE on Injury Statistics criteria for indicators Cryer C, Langley J. Developing indicators of injury incidence that can be used to monitor global, regional and local trends, 2008.

5 Barriers to international comparability Coding rules Example: Manner of death Data quality Example: Unspecified codes ICE developed fixes Categorization of ICD codes into meaningful groups: External cause of injury matrices, Injury Mortality Diagnosis Matrix, and Barell Matrix for body region and nature

6 Example: International comparison of drowning death rates Unintentional drowning CountryDeath rate per 100,000 Australia 9.9 United Kingdom 3.4 United States 11.1 Why is the UK rate so low? Source: Bhalla, K., Harrison, J., Fingerhut, L., Shahraz, S., Abraham, J., Hsiu-Yeh, P., on behalf of the GBD Injury Expert Group, The Global Injury Mortality Database, Version 2.0, Released on October 21 2009, Available from www.globalburdenofinjuries.org

7 Source: Bhalla, K., Harrison, J., Fingerhut, L., Shahraz, S., Abraham, J., Hsiu-Yeh, P., on behalf of the GBD Injury Expert Group, The Global Injury Mortality Database, Version 2.0, Released on October 21 2009, Available from www.globalburdenofinjuries.org Age adjusted rate per 100,000 Drowning rates per million population for selected countries, 2004

8 External cause of injury mortality matrix UnintentionalSuicideHomicideUndeterminedLegal intervention / war All injury Cut / pierce Drowning...... Suffocation Unspecified intent mechanism ICD External cause codes

9 Exposure to Unspecified Factor * Death rates, Selected countries, 2005 * ICD-10 X59 Exposure to Unspecified factor Source: Bhalla, K., Harrison, J., Fingerhut, L., Shahraz, S., Abraham, J., Hsiu-Yeh, P., on behalf of the GBD Injury Expert Group, The Global Injury Mortality Database, Version 2.0, Released on October 21 2009, Available from www.globalburdenofinjuries.org

10 Data Source Global Injury Mortality Database Data included: Country level cause of death (injury) tabulations disaggregated by age-sex external cause categories (based on Global Burden of Diseases (GBD) & ICE definitions) Sources of data: National civil registration systems If possible, from the WHO Mortality Database Other data submitted by the GBD Injury Expert Group* * http://sites.google.com/site/gbdinjuryexpertgroup http://sites.google.com/site/gbdinjuryexpertgroup

11 Data Source Global Injury Mortality Database Processing of data: Reclassified external causes to GBD and ICE definitions Quality checked by accessing the proportion of deaths coded to partially specified causes Redistributed cases with unspecified causes Data access: GBD Injury Expert Group Website at http://sites.google.com/site/gbdinjuryexpertgroup http://sites.google.com/site/gbdinjuryexpertgroup Use the Mortality Data : ICE Matrix Definitions

12 Injury death rates Selected countries, 2005 Source: Bhalla, K., Harrison, J., Fingerhut, L., Shahraz, S., Abraham, J., Hsiu-Yeh, P., on behalf of the GBD Injury Expert Group, The Global Injury Mortality Database, Version 2.0, Released on October 21 2009, Available from www.globalburdenofinjuries.org Age adjusted rate per 100,000 South America Europe Pacific Rim

13 Injury death rates Selected countries and years Source: Bhalla, K., Harrison, J., Fingerhut, L., Shahraz, S., Abraham, J., Hsiu-Yeh, P., on behalf of the GBD Injury Expert Group, The Global Injury Mortality Database, Version 2.0, Released on October 21 2009, Available from www.globalburdenofinjuries.org Age adjusted rate per 100,000

14 Source: Bhalla, K., Harrison, J., Fingerhut, L., Shahraz, S., Abraham, J., Hsiu-Yeh, P., on behalf of the GBD Injury Expert Group, The Global Injury Mortality Database, Version 2.0, Released on October 21 2009, Available from www.globalburdenofinjuries.org Age adjusted rate per 100,000 South America Europe Pacific Rim Motor vehicle traffic death rates Selected countries, 2005

15 Source: Bhalla, K., Harrison, J., Fingerhut, L., Shahraz, S., Abraham, J., Hsiu-Yeh, P., on behalf of the GBD Injury Expert Group, The Global Injury Mortality Database, Version 2.0, Released on October 21 2009, Available from www.globalburdenofinjuries.org Age adjusted rate per 100,000 South America Europe Pacific Rim Suicide rates Selected countries, 2005

16 Source: Bhalla, K., Harrison, J., Fingerhut, L., Shahraz, S., Abraham, J., Hsiu-Yeh, P., on behalf of the GBD Injury Expert Group, The Global Injury Mortality Database, Version 2.0, Released on October 21 2009, Available from www.globalburdenofinjuries.org Age adjusted rate per 100,000 South America Europe Pacific Rim Homicide rates Selected countries, 2005

17 ICE mortality indicators Progress on mortality indicators Defined criteria Identified potential indicators Compared trends for selected countries Limitations of mortality indicators Quality and completeness of data Non-comparable data sources Potential measurement of extraneous factors

18 Traumatic Brain Injury mortality indicator Morbidity indicators Severity threshold for inclusion Probability of death Probability of admission Functional outcomes/ disability More ICE indicators to come …

19 E-mail us at MWarner@CDC.GOV or LChen3@cdc.gov MWarner@CDC.GOV LChen3@cdc.gov For more information on injury data and resources from NCHS, see: www.cdc.gov/nchs/injury.htm.www.cdc.gov/nchs/injury.htm Questions?

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