Table 2.
Demographic data and potential risk factors for reinfection of the different groups
| Demographic data | Group 1 (unicompartmental prostheses) (n = 6) | Group 2 (primary total knee replacement prostheses) (n = 37) | Group 3 (rotating hinged prosthesis with and without reinfection) (n = 20) | Group 3 (rotating hinged prostheses without reinfection) (n = 17) | Group 3 (rotating hinged prostheses with reinfection) (n = 3) |
|---|---|---|---|---|---|
| Age (years) | 57 ± 15 | 71 ± 8.3 | 74 ± 9.6 | 75 ± 10 | 73 ± 7.6 |
| BMI | 26 ± 2.3 | 31 ± 4.0 | 28 ± 3. 6 | 28 ± 3.5 | 29 ± 4.4 |
| Men | 4 | 14 | 13 | 10 | 3 |
| Women | 2 | 23 | 7 | 7 | 0 |
| Septic revisions before (number of patients) | 0 | 0 | 6 | 3 | 3 |
| Two-stage revisions | 0 | 0 | 10 | 3 | 7 |
| Fistula | 0 | 2 | 7 | 4 | 3 |
| Anemia | 0 | 11 | 7 | 5 | 2 |
| Urinary tract infection | 0 | 2 | 1 | 1 | 0 |
| Smoking | 0 | 4 | 1 | 1 | 0 |
| Thyroid disease | 0 | 5 | 2 | 2 | 0 |
| Vascular disease | 0 | 3 | 5 | 4 | 1 |
| Diabetes mellitus | 1 | 6 | 6 | 4 | 2 |
| Insulin use | 0 | 4 | 1 | 1 | 0 |
| Coronary heart disease | 1 | 10 | 7 | 7 | 0 |
| Heart insufficiency | 0 | 13 | 7 | 7 | 0 |
| Hypertonus | 2 | 27 | 15 | 12 | 3 |
| Rheumatoid arthritis | 0 | 3 | 1 | 1 | 0 |
| Lung disease | 0 | 3 | 2 | 2 | 0 |
| Steroid/immunosuppressive therapy | 0 | 5 | 2 | 2 | 0 |
| Hyperuricemia | 0 | 4 | 2 | 1 | 1 |
| Hyperlipidemia | 0 | 7 | 6 | 6 | 0 |
| ASA I + II | 6 | 32 | 17 | 14 | 3 |
| ASA III + IV | 0 | 5 | 3 | 3 | 0 |
ASA = American Society of Anesthesiology.