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Comment & Response
October 2018

Understanding the Limitations of Cancer Registry Insurance Data—Implications for Policy—Reply

Author Affiliations
  • 1Cancer Prevention Institute of California, Fremont, California
  • 2Stanford Cancer Institute, Stanford, California
  • 3Department of Epidemiology and Biostatistics, University of California, San Francisco
JAMA Oncol. 2018;4(10):1433-1434. doi:10.1001/jamaoncol.2018.2460

In Reply We thank Sabik and Bradley for raising these important points about our study.1 The lack of information on timing of and change in health insurance coverage is a limitation inherent to cancer registry data and, as discussed, has the potential to result in misclassification of patient insurance status. However, we reaffirm that the impact of any such misclassification on our results is likely to be minimal and would not alter the study’s conclusions.

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