Figure 2.

Overall rate of clinical improvement/weaning oxygen supplement rate/intensive care unit (ICU) or hospital discharge alive rate among hospitalized patients with influenza A or B virus infection. Shown are (A) cumulative incidences of clinical improvement, (B) weaning oxygen supplement rate, and (C) ICU or hospital discharge alive rate from admission to 28 days. Hazard ratios were adjusted for age, gender, heart disease, malignancies, and time from illness onset to starting antiviral treatments. Clinical improvement was defined as discharge or a 2-step descrese on a 7-point ordinal scale of clinical status after admission. Abbreviation: CI, confidence interval.