Figure 4From: Fluticasone propionate/salmeterol 250/50 μg versus salmeterol 50 μg after chronic obstructive pulmonary disease exacerbationOverall numbers of exacerbations by 4-week period, over 26 weeks of treatment following the 3-week stabilization period, ITT population.*Weeks from end of 21-day stabilization period. FP = fluticasone propionate; ITT = intent-to-treat; SAL: salmeterol.Back to article page