Patient demographics, prevalence of comorbid diseases and operative data related to primary hip and knee replacements for primary osteoarthritis in Finland from 1998 to 2008
| Hip replacements (n=43 747) | Knee replacements (n=53 007) | |
|---|---|---|
| N (%) or median (range) | N (%) or median (range) | |
| Patient demographics | ||
| Average age (range) | 68.5 (21–97) | 70.3 (32–97) |
| Age group (years) | ||
| <55 | 3293 (7.5) | 2195 (4.1) |
| 55–64 | 10387 (23.7) | 10338 (19.5) |
| 65–74 | 17932 (41.0) | 22369 (42.2) |
| ≥75 | 12135 (27.7) | 18105 (34.2) |
| Gender | ||
| Male | 18776 (42.9) | 15396 (29.0) |
| Female | 24971 (57.1) | 37611 (71.0) |
| Prevalence of comorbid diseases | ||
| Cardiovascular diseases | 7407 (16.9) | 9654 (18.2) |
| (Coronary heart disease) | 5255 (12.0) | 6641 (12.5) |
| (Atrial fibrillation) | 2348 (5.4) | 3049 (5.8) |
| (Heart failure) | 1509 (3.5) | 2338 (4.4) |
| Hypertension (without cardiovascular disease) | 7760 (17.7) | 11025 (20.8) |
| Diabetes | 2400 (5.5) | 3965 (7.5) |
| Cancer | 2231 (5.1) | 2759 (5.2) |
| Pulmonary disease | 2676 (6.1) | 4037 (7.6) |
| Depression | 502 (1.1) | 707 (1.3) |
| Psychotic disorders | 722 (1.7) | 1109 (2.1) |
| Neurodegenerative diseases | 610 (1.4) | 934 (1.8) |
| Any of the above | 18841 (43.3) | 25645 (48.4) |
| Operative data | ||
| Bilateral operation | 852 (2.0) | 3035 (5.7) |
| Fixation method | ||
| Cemented | 19404 (44.4) | 50494 (95.3) |
| Hybrid | 6896 (15.8) | 1543 (2.9) |
| Cementless | 17349 (39.7) | 958 (1.8) |
| Antibiotic prophylaxis | ||
| None or unknown | 93 (0.2) | 150 (0.3) |
| Intravenous only | 21292 (48.7) | 7376 (13.9) |
| Antibiotic-impregnated cement only | 359 (0.8) | 730 (1.4) |
| Combined | 21730 (49.7) | 44751 (84.4) |
| Operating hospital | ||
| University hospital | 8638 (19.9) | 10546 (19.9) |
| Central hospital | 17312 (39.6) | 20521(38.7) |
| District hospital | 7726 (17.7) | 8943 (16.9) |
| Other (including private hospitals) | 10071 (23.0) | 12997 (24.5) |