Table 2.

Multivariate Logistic Regression Analyses Comparing Patients with the Pandemic H1N1/09 Influenza and Those with Influenza-Like Illness

ILI, influenza like illness; OR, odds ratios; CI, confidence interval.

Multivariate logistic regression analyses were conducted via the 'backward (wald) stepwise' method. Only variables with p<0.1 in univariate analyses were included.

^*Includes diabetes, chronic pulmonary diseases, chronic cardiovascular diseases, chronic renal diseases, chronic liver diseases, cancer or immunocompromised state, neurodevelopmental disorders, pregnancy, or having ≥2 these co-morbidities (Table 1).