Total hospitalization duration. Numbers of study participants requiring hospitalization within a treatment arm are shown for canakinumab (red bar) or placebo (blue bar) according to overall duration of time spent in hospital. All hospital visit durations are summed for each patient. Time ranges include zero (0) (ie, no time spent in hospital) and time periods ranging from 1 to 10 days, 11 to 20 days, or >50 days. There was no study participant in either treatment group whose total time in hospital was between 30 and 50 days.