Improvements were maintained at the final visit , 3 months after treatment ( e.g. , left side at maximum contraction-onabotulinumtoxinA mean score : 2.21 [ baseline ] vs 0.93 [ 1 month ] vs 1.71 [ 3 months ] ; incobotulinumtoxinA mean score : 2.21 vs 0.86 vs 1.50 ) .