13 June 2022 : Database Analysis
Retrospective Study from a Single Center to Identify Risk Factors Associated with Reinfection in Patients Undergoing 2-Stage Revision Surgery for Periprosthetic Joint Infection
Bingshi Zhang1ABCE, Zeming Liu1CE, Sikai Liu1BC, Bo Liu1BC, Mengnan Li1B, Wenao Li1E, Yongtai Han1ABCDE*DOI: 10.12659/MSM.936973
Med Sci Monit 2022; 28:e936973
Table 5 Scoring system for predicting infection recurrence in patients with PJI undergoing 2-stage hip revision surgery.
| Risk factors | β-coefficient | Predictive score (total=100 points) |
|---|---|---|
| CRP | ||
| <30 mg/L | Ref. | 0 |
| 30–80 mg/L | 1.205 | 7.5 |
| >80 mg/L | 2.323 | 14.5 |
| Bacterial infection | ||
| Negative | Ref. | 0 |
| G+ bacteria | 1.195 | 7.5 |
| G− bacteria | 2.551 | 16 |
| Age (years) | ||
| <40 | Ref. | 0 |
| 40–70 | 0.852 | 5.5 |
| >70 | 1.875 | 12 |
| Immunosuppression | ||
| No | Ref. | 0 |
| Yes | 2.205 | 14 |
| Albumin/globulin | ||
| >2 | Ref. | 0 |
| 2–0.8 | 0.852 | 5.5 |
| <0.8 | 1.211 | 7.5 |
| Glucose | ||
| <5.6 | Ref. | 0 |
| 5.6–11.2 | 1.209 | 7.5 |
| >11.2 | 2.208 | 14 |
| MRI findings | ||
| Negative findings | Ref. | 0 |
| Lamellated hyperintense synovitis or soft tissue edema | 2.427 | 15 |
| Both | 3.501 | 22 |
| Ref. – reference; CRP – C-reactive protein. The AUC of this scoring system was 0.965 (95% CI=0.947–0.983). The total score was the sum of the scores for each item. The predictive scores for a low risk (estimated incidence of infection recurrence ≤30%), moderate risk (estimated incidence of infection recurrence of 31–69%), and high risk (estimated incidence of infection recurrence ≥70%) of infection recurrence were ≤45 points, 46–77 points and ≥78 points, respectively. | ||