Baseline characteristics of groups
| Group 1 | Group 2 | Group 3 | |
|---|---|---|---|
| No. of patients (female %) | 373 (70) | 119 (68) | 42 (67) |
| Median age by year (range) | 75 (32–96) | 76 (31–94) | 79 (50–90) |
| Percentage of marrow edema in MR images (available MR images, %) | 89 (86) | 85 (96) | 89 (90) |
| Percentage of bone uptake (available bone scan reports, %) | 90 (19) | 80 (29) | 100 (17) |
| Pain score (1–10), at rest/with activity | 4.2/8.2 | 4.5/8.5 | 3.4/8.1 |
| Roland-Morris score | 18.4 | 19 | 19.2 |
| Percentage of preop narcotic medication | 65 | 69 | 49 |
Note:—Preop indicates preoperative.