Table 3

 Difference between effect of salmeterol and placebo on lung function and volume parameters after 12 months of treatment

ParameterTreatment difference(salmeterol–placebo)p value95% CI
FEV1, forced expiratory volume in 1 second; FVC, forced vital capacity; IC, inspiratory capacity; MMEF, maximum mid-expiratory flow; SVC, slow vital capacity.
FEV1120 ml<0.000160 to 170
FVC120 ml0.01030 to 210
IC140 ml0.03510 to 270
MMEF150 ml/s0.000570 to 240
SVC150 ml0.02220 to 280