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. Author manuscript; available in PMC: 2019 Jul 17.
Published in final edited form as: Pediatr Neurol. 2017 Aug 23;76:72–78. doi: 10.1016/j.pediatrneurol.2017.08.005

FIGURE.

FIGURE.

Case classification based on medical record abstraction for patients ages 1 to 5 months who had a medical visit with an International Classification of Diseases, Ninth Revision “convulsion” code during specified time intervals following vaccination. The total number of patients is shown first followed in parentheses by the number of patients whose events occurred during the risk interval and the control interval, respectively. The risk interval was postvaccination days 0 to 1 and the control interval was postvaccination days 14 to 20. CNS, central nervous system; FS, febrile seizure.