Primary mobility outcomes and secondary outcomes.

aHigher scores reflect better performance.bLower scores reflect better performance.cBetween group differences are from linear regression models with change score (final minus initial) score as the dependent variable and group allocation and baseline performance on that item as independent variables.dBetween group differences are from linear regression models with follow-up score as the dependent variable and group allocation and baseline performance on that item as independent variables.eBetween group differences are from ordinal regression models with follow-up score as the dependent variable and group allocation and baseline performance on that item as independent variables.fBetween group differences are from negative binomial regression models with the total number of events as the dependent variable and group allocation and number of events at baseline as independent variables.gsome participants unable to be assessed due to knee pain or skin problems; data available for 168 per group at baseline; 3 months 131 control, 152 intervention;12 months 151 control, 156 intervention.Bold indicates pPrimary mobility outcomes and secondary outcomes.