Table 5.
Patient-reported outcomes for populations studied, by head size
| 28 mm | 32 mm | 36 mm | p-value a | |
|---|---|---|---|---|
| Number (%) | 1,864 (40.6) | 869 (18.9) | 1,863 (40.5) | |
| Oxford hip score | ||||
| Preoperative, mean (SD) range | 18.2 (8.0) 1–44 | 18.3 (7.9) 2–43 | 19.6 (8.2) 0–46 | < 0.001 |
| Postoperative, median (range) | 43 (0–48) | 41 (4–48) | 48 (2–48) | < 0.001 |
| EQ5D index | ||||
| Preoperative, mean (SD) range | 0.366 (0.315) -0.484 to 1 | 0.365 (0.316) -0.319 to 1 | 0.401 (0.311) -0.594 to 1 | 0.001 |
| Postoperative, median (range) | 0.848 (-0.319 to 1) | 0.796 (-0.126 to 1) | 0.850 (-0.594 to 1) | < 0.001 |
| Satisfaction, n (%) | < 0.001 | |||
| Excellent | 791 (42.4) | 319 (36.7) | 803 (43.1) | |
| Very good | 683 (36.6) | 299 (34.4) | 673 (36.1) | |
| Good | 288 (15.5) | 190 (21.9) | 273 (14.7) | |
| Fair | 77 (4.1) | 46 (5.3) | 79 (4.2) | |
| Poor | 25 (1.3) | 15 (1.7) | 35 (1.9) | |
| Success, n (%) | 0.001 | |||
| Much better | 1,673 (89.8) | 736 (84.7) | 1,658 (89.0) | |
| A little better | 124 (6.7) | 103 (11.9) | 134 (7.2) | |
| About the same | 27 (1.5) | 14 (1.6) | 30 (1.6) | |
| A little worse | 22 (1.2) | 10 (1.2) | 29 (1.6) | |
| Much worse | 18 (1.0) | 6 (0.7) | 12 (0.6) | |
| Time from operation to PROMs completion, mean days (SD) range | 207 (26) 183–361 | 209 (28) 184–357 | 210 (29) 183–363 | 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.