Crude and Adjusted OR for Hospitalized and Non-hospitalized Cases and Controls.

<p>Note: OR = Odds Ratio.</p><p>*Adjusted for sex, age group, and number of prior vaccinations.</p

Crude and Adjusted OR for Any Vaccine Received in 2008–2009.

<p>*Adjusted for sex, age group, and number of prior vaccinations.</p

Influenza Vaccine Effectiveness by Influenza Subtype: Comparison to Matched Healthy Controls.

*<p>Influenza subtype data only available for USAFSAM cases. Due to small sample size, adjusted estimates not available.</p

Number of Hospitalized and Non-hospitalized pH1N1 Cases by Week.

<p> Light Bars = Non-Hospitalized Cases. Dark Bars = Hospitalized Cases.</p

Univariate Analysis and Characteristics of pH1N1 Cases and Controls.

<p>Note: OR = Odds Ratio.</p

Crude and Adjusted OR for Specific Age-Groups for Any Vaccine Received in 2008–2009.

<p>**Adjusted for sex and number of prior vaccinations.</p

Influenza Vaccine Effectiveness by Control Group and Vaccine Type.

*<p>Adjusted for sex, age group, and number of prior vaccinations.</p><p>̂Adjusted for sex, age group, number of prior vaccinations, and month of diagnosis.</p

Characteristics of Influenza Cases and Unmatched Test-Negative Controls.

<p>Bolded cells indicate statistical significance.</p

Vaccine-specific Crude and Adjusted OR for Cases Received the 2008–2009 Trivalent Influenza Vaccine (TIV) or Live Attenuated Influenza Vaccine (LAIV).

<p>Note: OR = Odds Ratio.</p><p>*Adjusted for sex, age group, and number of prior vaccinations.</p

Characteristics of Influenza Cases Matched to Healthy Controls.

<p>Bolded cells indicate statistical significance.</p