Dose−response results of peak FEV1at steady-state (modified intent-to-treat population). Model average values for OD and BID dosing regimens, with 90% confidence limits (red and blue shaded areas, respectively). FEV1: forced expiratory volume in one second; OD: once daily; BID: twice daily.
Arievich et al. BMC Pulmonary Medicine 2012 12:74 doi:10.1186/1471-2466-12-74