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Figure. Unadjusted pooled survival curves among the vaccinated study population. Outcomes include influenza-like illness (A); hospitalization for influenza/pneumonia (B); and death (C). In matched years, vaccination is expected to be effective in preventing influenza-related outcomes; in mismatched years, the expected effect is minimal.

Table 1. Description of Study Cohortsa
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Table 2. Description of Influenza Seasonsa
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Table 3. Estimates of Vaccine Effectiveness Comparing Vaccinated vs Unvaccinated Populations by Year
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Table 4. RHR Estimates of Vaccine Effectiveness by Comparing Matched vs Mismatched Years Among Vaccinated vs Unvaccinated Populations
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Original Investigation
Apr 9, 2012

Influenza Vaccine Effectiveness in Patients on HemodialysisAn Analysis of a Natural Experiment

Author Affiliations

Author Affiliations: Department of Epidemiology, Gillings School of Global Public Health (Ms McGrath and Drs Cole, Weber, Stürmer, and Brookhart), Divisions of Nephrology and Hypertension (Dr Kshirsagar) and Infectious Diseases (Dr Weber), Department of Medicine, and The Cecil G. Sheps Center for Health Services Research (Dr Wang), University of North Carolina, Chapel Hill.

Arch Intern Med. 2012;172(7):548-554. doi:10.1001/archinternmed.2011.2238