Mean change in VAS diary pain score during full-dose treatment in the comparative phase (intent-to-treat population). The VAS ranged from 0 mm (no pain) to 100 mm (worst possible pain). The mean change was calculated from the mean of 21 full-dose injections for each patient. IFN, interferon; SD, standard deviation; VAS, visual analog scale.
Singer et al. BMC Neurology 2012 12:154 doi:10.1186/1471-2377-12-154