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Urgent HCU increased with disease severity. Data are shown as lifetime (ever) events and visits in the past year. Hosp, Inpatient hospitalizations; Vent, need for mechanical ventilation. White bars, mild (n = 164); hatched bars, moderate; black bars, severe asthma. *P < .0001, all groups are different from each other; †P < .0001, mild and moderate groups are similar, but different from severe group.
