Footwear adherence at home increases 1 week after motivational interviewing to clinically relevant but not statistically significant levels (ie, 80%) but then returns over time to baseline levels. Away from home, adherence is already sufficient at baseline and remains so over time. The use of motivational interviewing seems feasible for the given purpose and patient group. These findings provide input to larger trials and provisionally suggest that additional or adjunctive therapy may be needed to better preserve adherence.

Implementing telephonic low-budget follow-up interviews for ROM is feasible, but selection bias threatens internal validity of data, limiting generalization to the total treatment population. Increased efforts to track patients for follow-up may improve generalization.