Estimating Crashes Involving Heavy Vehicles in Western Australia, 1999-2000: A Capture-Recapture Method

The present study explores a two�sample capture-recapture method in an exploratory study of police and hospital records to estimate the amount of fatalities and serious injuries for heavy vehicle drivers involved in heavy vehicle crashes in Western Australia. Each heavy vehicle driver involved in a crash from the police report was matched against the heavy vehicle driver's hospitalization record from the Hospital Morbidity Data System, with surname, initials, date of birth, gender, date of crash, road user type and vehicle type as matching fields. The estimated number of fatalities and serious injuries to heavy vehicle drivers from July 1999 to December 2000 (inclusive) was 5 and 59, respectively, which was 25 and 31% higher based on the capture�recapture methodology than the aggregated (non-overlapping) total officially reported to the police and hospitals. The study found no significant age difference for drivers involved in a heavy vehicle crash between the two sources (37 years versus 40 year of age). Female heavy vehicle drivers were over-represented in the hospital records (11%) compared to the police records (1%). These results support using the capture�recapture approach for evaluating the completeness of data sources and identifying biases within datasets.


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  • Accession Number: 01013452
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Dec 15 2005 7:05PM