Improvement in spirometry was similar between the two groups -LSB- mean change in FEV@ % predicted : IV group @ ( standard deviation @ ) versus TNS group @ ( @ ) , p = @ -RSB- , but there was more suppression of sputum Psa in the TNS group -LSB- mean difference between treatments @ log@ colony-forming units/mL ( CI @ to @ ) , p = @ -RSB- .