Supporting Data
Fig. 1 - Scatterplot of age versus average number of steps per day, showing a high degree of variability. (Reprinted, with permission, from Schmalzried TP, Szuszczewicz ES, Northfield MR, Akizuki KH, Frankel RE, Belcher G, Amstutz HC. Quantitative assessment of walking activity after total hip or knee replacement. J Bone Joint Surg Am. 1998;80:54-9.)
Supporting Data
Commentary and Perspective by Thomas P. Schmalzried, MD, Joint Replacement Institute at Orthopaedic Hospital, Los Angeles, California
Supporting Data
The details of the decision-analysis model.