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Adjusted mean work productivity by ACT score in patients with asthma *p≤0.001; p-values represent significance of the regression coefficient in the regression model with patients with well-controlled asthma (ACT score 20–25) as the reference group. Covariates included age, sex, Charlson Comorbidity Index, race/ethnicity, income, body mass index, smoking status, exercise, insurance type and years diagnosed with asthma. ACT, asthma control test; RR, rate ratio.
