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EA, elderly asthma; NEA, non-elderly asthma; EXA, exacerbation; ATO, atopy; BMI, body mass index; SMOKE, 10 pack year smoking; Ratio, forced expiratory volume in 1 second per forced vital capacity; EOS, eosinophil; FEV1, forced expiratory volume in 1 second; FEV1P, percentage of forced expiratory volume in 1 second; FVC, forced vital capacity; FVCP, percentage of forced vital capacity.
