Table 2.
Changes in clinical outcomes of HHS and UCLA activity rating scale
| Score (range) | Baseline | 6 months | 12 months | 18 months | 24 months | 30 months | 36 months | P-value |
|---|---|---|---|---|---|---|---|---|
| Number of patients assessed | 20 | 20 | 20 | 15 | 14 | 14 | 6 | |
| HHS (0–100) | 57.6 ± 16.4 | 83.1 ± 11.7 | 78.7 ± 15.1 | 79.5 ± 14.4 | 79.4 ± 14.8 | 78.2 ± 16.3 | 76.5 ± 18.2 | = 0.005† |
| 49.8 to 65.3 | 77.6 to 88.6 | 71.6 to 85.8 | 72.1 to 87.0 | 71.2 to 87.7 | 69.1 to 87.2 | 61.2 to 91.7 | ||
| 60.5 (21–83) | 84.5 (56–96) | 79.5 (52–100) | 79.0 (52–10) | 77.0 (52–100) | 77.0 (42–100) | 80.0 (42–96) | ||
| UCLA scale (1–10) | 3.7 ± 1.4 | 5.2 ± 1.0 | 5.3 ± 1.1 | 5.3 ± 0.9 | 5.5 ± 0.9 | 5.3 ± 0.9 | 5.2 ± 0.9 | = 0.014‡ |
| 3.0 to 4.3 | 4.7 to 5.6 | 4.7 to 5.9 | 4.8 to 5.8 | 5.0 to 6.0 | 4.8 to 5.9 | 4.4 to 6.1 | ||
| 3 (2–8) | 5 (3–7) | 5 (3–8) | 5 (4–7) | 5 (4–7) | 5 (4–7) | 5 (4–7) |
Data of the upper row are expressed as mean ± SD; middle row, 95% CI; and bottom row, median (range). The P-value was calculated for the effect of time in a repeated-measures linear mixed-effects model. The HHS ranged from 0 to 100.0, with a high positive value indicating a more functional hip joint. The UCLA activity rating scores ranged from 1 to 10, with 10 indicating “regularly participate in impact sports” and 1 indicating “wholly inactive, cannot leave residence”
HHS Harris hip score, UCLA University of California, Los Angeles, SD standard deviation, CI confidence interval