Fig. 2

The proportion of participants scheduled to undergo TKA reporting difficulty performing basic tasks (measured by the WOMAC Pain scale) and more demanding activities (measured by the KOOS Sport and Recreational Activity subscale), stratified by level of WOMAC Pain. The dark blue portions of the bars represent patients who expressed severe or extreme difficulty performing each of the WOMAC Pain or KOOS Sport and Recreational Activity items. The light blue portions of the bars show patients who reported moderate difficulty with these same items. The total height of the bars represents the proportion of patients in each WOMAC Pain group who expressed moderate or greater difficulty performing each of the tasks