Table 1.
Patient demographics
| Demographics | Prestudy period (1998–2002) | Poststudy period (2006–2010) | ||||
|---|---|---|---|---|---|---|
| Patients with osteoarthritis | Patients with osteoarthritis treated with arthroscopy | Patients with osteoarthritis treated with arthroscopy followed by arthroplasty | Patients with osteoarthritis | Patients with osteoarthritis treated with arthroscopy | Patients with osteoarthritis treated with arthroscopy followed by arthroplasty | |
| Total number of patients | 190,659 | 6972 | 266 | 277,318 | 10,645 | 496 |
| Gender | ||||||
| Male (%) | 184,054 (97%) |
6645 (95%) |
255 (96%) |
262,415 (95%) |
9924 (93%) |
466 (94%) |
| Female (%) | 6605 (3%) |
327 (5%) |
11 (4%) |
14,903 (5%) |
721 (7%) |
30 (6%) |
| Age | ||||||
| Average age (years) | 67.1 | 59.3 | 62.0 | 67.0 | 59.3 | 60.3 |
| Patients 50–55 years (%) | 35,850 (19%) |
3036 (44%) |
75 (28%) |
38,054 (14%) |
3218 (30%) |
118 (24%) |
| Patients 55–65 years (%) | 44,355 (23%) |
2429 (35%) |
100 (38%) |
109,103 (39%) |
5963 (56%) |
294 (59%) |
| Patients 65 years and older (%) | 110,454 (58%) |
1507 (21%) |
91 (34%) |
130,161 (47%) |
1464 (14%) |
84 (117%) |