POSTN and asthma: Multivariate analyses showed that periostin levels were not associated with a flare (yes vs no) visit after adjusting for baseline periostin level, ANCA type (ever positive or not), active asthma in the past 28 days, and use of immunosuppressive therapies (adjusted OR 1.00 [95% CI 0.98 to 1.02], p = 0.98)(Table 2).