Does a consumer co‐designed infographic increase knowledge of physical activity after total knee joint replacement? A randomised controlled trial.

Purpose: To determine if a consumer co‐designed infographic increased knowledge of physical activity and self‐efficacy for exercise after total knee joint replacement surgery. Methods: Forty‐four adults with primary knee joint replacement surgery were recruited from a public and a private hospital in Melbourne, Australia. Participants were randomly allocated to an experimental or control group. The experimental group received a consumer co‐designed infographic. All participants received usual care. Primary outcome measures were knowledge of physical activity and self‐efficacy for exercise. Outcomes were administered at baseline, week 1 and week 6. Semi‐structured interviews with experimental group participants explored the acceptability, implementation and efficacy of the infographic. Results: There were no between‐group differences for knowledge of physical activity at week 1 (MD −0.02 units, 95% CI −0.9 to 0.9) or week 6 (MD 0.01 units, 95% CI −0.9 to 0.9). Self‐efficacy for exercise increased at week 1 (MD 14.2 units, 95% CI 2.9–25.4) but was not sustained. Qualitative data showed that the infographic was embraced by some participants but not by others. Conclusions: A consumer co‐designed infographic did not improve knowledge of physical activity but may have had a short‐term positive effect on self‐efficacy for exercise after knee joint replacement. Trial registration ACTRN12621000910808. [ABSTRACT FROM AUTHOR]