Table 3.
Clinical and radiographic outcomes
| Variable | Group 1 | Group 2 | p value | ||
|---|---|---|---|---|---|
| Total | Open | Arthroscopic | |||
| Time to THA (years)* | 3 ± 3 | 1 ± 1 | < 0.001 | ||
| Conversion to THA (number of hips) | 25/220 (11%) | 8/298 (3%) | 3 | 5 | < 0.001 |
| Mean HHS total (points) | |||||
| Preoperative | 64 | 57 | 64 | 57 | 0.002 |
| Postoperative | 89 | 78 | 89 | 77 | < 0.001 |
| Mean HHS pain (points) | |||||
| Preoperative | 26 | 30 | NA | 0.43 | |
| Postoperative | 40 | 40 | NA | 1.00 | |
| Mean HHS function (points) | |||||
| Preoperative | 31 | 31 | NA | 1.00 | |
| Postoperative | 41 | 47 | NA | 0.40 | |
| Tönnis grade (number of patients)† | 0.003 | ||||
| 0 | 57 (37%) | 53 (59%) | NA | ||
| 1 | 74 (48%) | 26 (29%) | NA | ||
| 2 | 23 (15%) | 11 (12%) | NA | ||
* Values are expressed as mean ± SD; †Tönnis grades were missing for some patients; HHS = Harris hip score; NA = not available.