Table 6.
Change in DEXA cup and stem at 10 years compared to postoperative examination.
| ROI | PE | XLPE | p value* |
|---|---|---|---|
| Cup change (%) | n = 24 | n = 20 | |
| ROI 1 | −4 (−38 to 33) | −3 (−39 to 29) | 0.41 |
| ROI 2 | −3 (−22 to 49) | −1 (−32 to 82) | 0.64 |
| ROI 3 | 15 (−23 to 96) | 5 (−28 to 56) | 0.22 |
| ROI 4 | −4 (−56 to 74) | −22 (−53 to 22) | 0.04 |
| ROI 5 | −5 (−38 to 47) | −11 (−39 to 33) | 0.53 |
| Stem change (%) | n = 27 | n = 23 | |
| Upper femur (mean of ROIs 1, 2, 6, 7) | −14 (−33 to 2) | −9 (−40 to 4) | 0.69 |
| Lower femur (mean of ROIs 3–5) | 0 (−34 to 22) | −1 (−32 to 13) | 0.30 |
Values are expressed as median, with range in parentheses; * Mann-Whitney U test; DEXA = dual-energy x-ray analysis; ROI = region of interest; PE = polyethylene; XLPE = highly crosslinked polyethylene.