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Secondary outcome measure St George's Respiratory Questionnaire for chronic obstructive pulmonary disease patients (SGRQ-C). Boxplots of SGRQ-C total score over time by comparative groups split by a) no aspirin and aspirin and b) no ticagrelor and ticagrelor (intention-to-treat analysis set). i) Baseline; ii) 1 month; iii) 6 months.
