PMC full text:
Published online 2009 May 1. doi: 10.1007/s11999-009-0853-3
Table 1
Matched group characteristics
| Variables | Osteoarthritis protrusion (%) | Protrusion joint preservation (%) | Osteoarthritis control (%) |
|---|---|---|---|
| No. Patients | 19 | 12 | 29 |
| No. Hips | 29 | 12 | 29 |
| Gender | |||
| Male | 2 (11) | 2 (17) | 6 (21) |
| Female | 17 (89) | 10 (83) | 23 (79) |
| Tonnis Scale | |||
| Grade 0 | 0 (0) | 3 (25) | 0 (0) |
| Grade 1 | 9 (31) | 8 (67) | 8 (28) |
| Grade 2 | 8 (28) | 1 (8) | 11 (38) |
| Grade 3 | 12 (41) | 0 (0) | 10 (34) |