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SGRQ total score results at 12 weeks for the individual patient and aggregate met-analyses with and without covariates for indacaterol 75 μg versus alternative treatments. AD = Aggregate data; FOR = Formoterol 12 μg; IND 75 = Indacaterol 75 μg; IPD = Individual patient data; SAL = Salmeterol 50 μg; SGRQ = St. George Respiratory Questionnaire; TIO = Tiotropium 18 μg.
