Volume 19, Number 6—June 2013
Active Surveillance for Influenza A Virus among Swine, Midwestern United States, 2009–2011
|Variable||Estimate||Odds ratio (95% CI)||p value|
|Influenza virus subtype‡|
|Mixed infection||–2.210||0.2 (0.04–1.3)||0.93|
*Logistic regression univariate analysis; NA, not applicable.
†Generalized χ2 divided by degrees of freedom = 0.96.
‡Likelihood ratio χ2 (6) = 6.01 df, p = 0.42.
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