Figure 3.

Effects of influenza A virus vs influenza B virus for worse clinical outcomes among hospitalized patients at days 7, 14, and 28 according to the 7-category ordinal scale end point. Odds ratios and 95% confidence intervals were estimated by ordinal logistic models based on the 7-point ordinal outcome scale, adjusting for age, gender, heart disease, malignancies, and time from illness onset to starting antiviral treatment. Patients hospitalized with influenza A virus infection were taken as the reference when modeling. Abbreviations: CI, confidence interval; ECMO, ; ICU, intensive care unit; OR, odds ratio.