In terms of the mean FEV1 after 12 weeks of treatment , the difference between the FLU/FOR and BUD/FOR groups was 0.22 L ( 95 % CI : -0.06 to 0.49 ) , whereas the difference between the FLU/FOR and FLU groups was 0.26 L ( 95 % CI : -0.002 to 0.52 ) .