Selected objective gait and balance measures captured by body-worn sensors every 6 months for 18 months include Stride Velocity (A.), sway range in the medio-lateral direction with eyes closed (Range ML EC, B.), Sway Area EC (C.), and Sway Area eyes open (EO, D.). Every 6 month collection of the Timed 25 Foot Walk (T25FW, E.) and the self rated balance measure Activities of Balance Confidence (ABC, F.) are also presented. No one measure worsened across time, however the moderately disabled MS cohort (MSmod) performed worse on all measures than the mildly disabled MS cohort (MSmild). The MSmild group was either worse or the same as the control group for the same measures. Bars represent standard error of the mean (SEM) among each group.