TABLE WO-2Age-Specific Severity Estimates

sCHR: Ratio of Hospitalizations to Symptomatic CasessCIR: ratio of ICU Admissions to Symptomatic CasessCFR: Ratio of Deaths to Symptomatic Cases
Self-reported ILI denominator (NYC data only)0–4 yr0.33% (0.21–0.63)0.044% (0.026–0.078)0.004% (0.001–0.011)
5–17 yr0.11% (0.08–0.18)0.019% (0.013–0.027)0.002% (0.000–0.004)
18–64 yr0.15% (0.11–0.25)0.029% (0.021–0.040)0.010% (0.007–0.016)
65+ yr0.16% (0.10–0.30)0.030% (0.016–0.055)0.010% (0.003–0.025)
Total0.16 % (0.12–0.26)0.028% (0.022–0.035)0.007% (0.005–0.009)
Self-reported frequency of seeking care (NYC/Milw/CDC data)0–4 yr2.19% (0.85–5.73)0.275% (0.097–0.777)0.022% (0.005–0.088)
5–17 yr0.53% (0.27–1.34)0.088% (0.043–0.240)0.009% (0.003–0.030)
18–64 yr2.66% (1.35–5.56)0.458% (0.230–1.019)0.136% (0.065–0.311)
65+ yr0.57% (0.11–12.78)0.100% (0.016–2.185)0.028% (0.003–0.0672)
Total1.37% (0.68–2.52)0.222% (0.022–0.035)0.045% (0.020–0.081)

NOTE: These estimates have changed slightly following revision of the work, and updated numbers will be available at the following website and in the published version of the paper.

SOURCE: Reprinted from Presanis et al. (2009).

From: Workshop Overview

Cover of The Domestic and International Impacts of the 2009-H1N1 Influenza A Pandemic
The Domestic and International Impacts of the 2009-H1N1 Influenza A Pandemic: Global Challenges, Global Solutions: Workshop Summary.
Institute of Medicine (US) Forum on Microbial Threats.
Washington (DC): National Academies Press (US); 2010.
Copyright © 2010, National Academy of Sciences.

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