In addition to the use of the MMSR, students' mind maps were compared to an expert map, based on a consensus among several experts, to verify whether students' mind maps covered the text content adequately.
A total of 186 mind maps (3 measurement occasions for 62 participants) were scored by two independent trained coders by means of the MMSR. The second coder double scored respectively 24 mind maps per measurement occasion and was not aware of the order in which the texts were presented to the students.
Table 3 presents the average scores on the different subcomponents in the MMSR for each measurement occasion.
All patients who underwent MMSR were selfreferred specifically for MMSR.
The patients with 36-mm metal-metal bearing THA had essentially the same height (68.2 inches), weight (181 pounds), and BMI (27.2 kg/m2) as the patients with an MMSR and were significantly taller (p < 0.0001), leaner (p < 0.0001), and had a higher preoperative UCLA activity score (4.8 vs 2.9; p < 0.0001) than the other patients undergoing THA, with no significant differences in age, diagnoses, or Charnley class.
The postoperative outcome of patients with a 36-mm metal-metal bearing THA was similar to the MMSR group and significantly better than the other patients undergoing THA, with a higher average Harris hip score (99 vs 94; p = 0.05), higher average function score (p = 0.05), higher average SF-12 physical score (563 vs 42; p < 0.0001), higher average SF-12 mental score (57 vs 50; p = 0.007), and a higher average UCLA activity score (7.7 vs 4.9; p < 0.0001).
We hypothesized that the functional benefits of MMSR are due, at least in part, to patient-related variables, such as age and general health status.
The demographics and outcomes of these MMSR patients are similar to other reported series.2-4 The main limitation of the current study was lack of randomization, which was not possible, because all of the patients undergoing resurfacing were self-referred specifically for that procedure.