Table 4.
Patient-reported outcomes for populations studied, by bearing
| Metal-on-polyethylene | Ceramic-on-polyethylene | Ceramic-on-ceramic | p-value a | |
|---|---|---|---|---|
| Number (%) | 2,171 (47.2) | 361 (7.9) | 2,064 (44.9) | |
| Oxford hip score | ||||
| Preoperative, mean (SD) range | 18.4 (8.0) 1–43 | 18.5 (8.4) 0–43 | 19.2 (8.1) 1–46 | 0.003 |
| Postoperative, median (range) | 42 (0–48) | 41 (7–48) | 43 (2–48) | < 0.001 |
| EQ5D index | ||||
| Preoperative, mean (SD) range | 0.368 (0.314)-0.349 to 1 | 0.375 (0.331) -0.484 to 0.883 | 0.394 (0.311) | 0.01 -0.594 to 1 |
| Postoperative, median (range) | 0.815 (-0.319 to 1) | 0.796 (-0.319 to 1) | 0.848 (-0.594 to 1) | 0.008 |
| Satisfaction, n (%) | 0.3 | |||
| Excellent | 882 (40.6) | 144 (39.9) | 887 (43.0) | |
| Very good | 804 (37.0) | 123 (34.1) | 728 (35.3) | |
| Good | 364 (16.8) | 66 (18.3) | 321 (15.6) | |
| Fair | 90 (4.2) | 23 (6.4) | 89 (4.3) | |
| Poor | 31 (1.4) | 5 (1.4) | 39 (1.9) | |
| Success, n (%) | 0.05 | |||
| Much better | 1,936 (89.2) | 303 (83.9) | 1,828 (88.6) | |
| A little better | 157 (7.2) | 46 (12.7) | 158 (7.7) | |
| About the same | 33 (1.5) | 3 (0.8) | 35 (1.7) | |
| A little worse | 26 (1.2) | 6 (1.7) | 29 (1.4) | |
| Much worse | 19 (0.9) | 3 (0.8) | 14 (0.7) | |
| Time from operation to PROMs completion, mean days (SD) range | 208 (28) 183–363 | 207 (23) 183–333 | 210 (29) 183–361 | 0.002 |
PROMs: patient-reported outcome measures.
a
1-way ANOVA was used for parametric data, Kruskal-Wallis test for non-parametric data, and chi-squared test for proportions.