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Related Experiment Videos

Geocoding in cancer research: a review.

Gerard Rushton1, Marc P Armstrong, Josephine Gittler

  • 1Department of Geography, University of Iowa, Iowa City, Iowa 52242, USA. gerard-rushton@uiowa.edu

American Journal of Preventive Medicine
|February 7, 2006
PubMed
Summary

Accurate geocoding of cancer records is crucial for research. Using longitude and latitude as the primary geocode improves data accuracy and flexibility for cancer surveillance and health studies.

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Area of Science:

  • Epidemiology
  • Geographic Information Systems (GIS)
  • Public Health

Background:

  • Geographic identifiers (geocodes) are essential for cancer records, but standardization is lacking.
  • Current geocoding practices vary, leading to inaccuracies in cancer data.
  • Linking geocoded cancer data with demographic and environmental data presents unique accuracy challenges.

Purpose of the Study:

  • To review geocoding practices for cancer records.
  • To discuss methods for enhancing the accuracy of geocoded cancer data.
  • To recommend the optimal form of geocode for cancer research.

Main Methods:

  • Review of existing geocoding practices and literature.
  • Analysis of error sources in geocoding, including digital boundary file quality.

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  • Evaluation of accuracy considerations for linked health data and distance computations.

    • Main Results:

    • Discrepancies in geocoding methods introduce errors (commission and omission).
    • Poor quality digital boundary files are a significant source of geocoding error.
    • Accuracy of computed distances varies in health services applications.
    • Privacy and confidentiality are key concerns in releasing geocoded cancer data.

    Conclusions:

    • The longitude and latitude of each case is the superior basic geocode.
    • This approach allows for the construction of all other desired geocodes.
    • Using a single geographic area type as the geocode can limit future research potential.