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Journal Article

Citation

Kostylova A, Swaine B, Feldman D. Inj. Prev. 2005; 11(3): 186-190.

Affiliation

Centre de recherche interdisciplinaire en readaptation du Montreal metropolitain, Institut de readaptation de Montreal, Canada.

Copyright

(Copyright © 2005, BMJ Publishing Group)

DOI

10.1136/ip.2004.006585

PMID

15933413

PMCID

PMC1730226

Abstract

OBJECTIVES: (1) To determine the concordance between injury diagnoses (head injury (HI), probable HI, or orthopedic injury) for children visiting an emergency department for an injury using two DATA SOURCES: an injury surveillance system (Canadian Hospitals Injury Research and Prevention Program, CHIRPP) and a physician billing claims database (Regie de l'assurance maladie de Quebec, RAMQ), and (2) to determine the sensitivity and specificity of diagnostic and procedure codes in billing claims for identifying HI and orthopedic injury among children. DESIGN: In this cross sectional cohort, data for 3049 children who sought care for an injury (2000-01) were obtained from both sources and linked using the child's personal health insurance number. METHODS: The physician recorded diagnostic codes from CHIRPP were used to categorize the children into three groups (HI, probable HI, and orthopedic), while an algorithm, using ICD-9-CM diagnostic and procedures codes from the RAMQ, was used to classify children into the same three groups. RESULTS: Concordance between the data sources was "substantial" (weighted Kappa 0.66; 95% CI 0.63 to 0.69). The sensitivity of diagnostic and procedure codes in the RAMQ database for identifying HI and for orthopedic injury were 0.61 (95% CI 0.57 to 0.64) and 0.97 (95% CI 0.96 to 0.98), respectively. The specificity for identifying HI and for orthopedic injury were 0.97 (95% CI 0.96 to 0.98) and 0.58 (95% CI 0.56 to 0.63), respectively. CONCLUSION: Combining diagnostic and procedures codes in a physician billing claims database (the RAMQ database) may be a valid method of estimating injury occurrence among children.

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