In Reply: Dr Lofthus and colleagues draw attention to the importance of verifying the accuracy of administrative health data used for population-based research. The availability of electronic information has allowed conducting research in populations that number in the millions. In contrast to traditional cohort studies, privacy concerns separate researchers from the primary collection of the data, and missing or inaccurate data cannot be recollected from the research participant.
Leslie WD, O’Donnell S. Database Validity in Assessing Population Trends in Hip Fracture Rates in Canada—Reply. JAMA. 2010;303(2):134–135. doi:10.1001/jama.2009.1974
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