Table 1.
Age, sex, and diagnosis at primary surgery in 4 time periods
| All | 1987–1992 | 1993–1997 | 1998–2002 | 2003–2007 | |
|---|---|---|---|---|---|
| n (%) | n (%) | n (%) | n (%) | n (%) | |
| Mean age | 69 | 69 | 70 | 70 | 70 |
| Sex (% women) | 70 | 70 | 70 | 70 | 69 |
| n | 110,882 | 24,651 | 24,659 | 28,817 | 32,755 |
| Diagnosis | |||||
| Osteoarthritis | 79,700 (72) | 16,597 (67) | 17,130 (70) | 20,976 (73) | 24,997 (76) |
| Rheumatoid arthritis | 3,465 (3.1) | 942 (3.8) | 902 (3.7) | 851 (3.0) | 770 (2.4) |
| Sequelae after fracture | 11,933 (11) | 3,299 (13) | 3,133 (13) | 2,886 (10) | 2,615 (8) |
| Sequelae dysplasia | 8,125 (7.3) | 2,037 (8.3) | 1,795 (7.3) | 2,032 (7.1) | 2,261 (6.9) |
| Sequelae dysplasia, total luxation | 879 (0.8) | 414 (1.7) | 214 (0.9) | 141 (0.5) | 110 (0.3) |
| Sequelae Perthes'/epiphysiolysis | 1,442 (1.3) | 319 (1.3) | 329 (1.3) | 388 (1.3) | 406 (1.2) |
| Ankylosing spondylitis | 477 (0.4) | 105 (0.4) | 116 (0.5) | 144 (0.5) | 112 (0.3) |
| Acute fracture | 969 (0.9) | 55 (0.2) | 116 (0.5) | 233 (0.8) | 565 (1.7) |