LS mean ( SE ) absolute change in daily ` off ' time ( h/day ) from baseline was -2.4 ( 0.28 ) with rotigotine 8 mg/24 h , and -1.5 ( 0.26 ) with placebo ; absolute change in ` off ' time in the 8 mg/24 h group compared with placebo was -0.85 h/day ( 95 % CI -1.59 , -0.11 ; p = 0.024 ) .