Table 3 Factors affecting implant survival
Variable | Patients (n = 41) | 5-year implant survival in % | 95% confidence interval | P (log-rank) |
|---|---|---|---|---|
Age at surgery | ||||
> 60 | 22 | 74% | 69–80 | n/s |
< 60 | 19 | 79% | 73–86 | n/s |
Comorbidities | ||||
Diabetes mellitus (DM) | 11 (26.8%) | 77% | 70–84 | n/s |
Hypertension (HTN) | 15 (36.5%) | 82% | 71–87 | n/s |
Ischemic heart disease (IHD) | 03 (7.31%) | 80% | 69–83 | n/s |
Rheumatoid arthritis (RA) | 04 (9.7%) | 70% | 69–81 | n/s |
Asthma | 03 (7.31%) | 78% | 74–81 | n/s |
SLE | 0 | 84% | 78–87 | n/s |
> 2 comorbidities | 04 (9.7%) | 71% | 69–85 | n/s |
No comorbidities | 01 (2.43%) | 70% | 69–81 | n/s |
Charlson comorbidity index (CCI) score | ||||
0–2 | 1 (2.4%) | 89% | 84–89 | n/s |
3–5 | 5 (12.1%) | 82% | 79–85 | n/s |
6–8 | 35 (85.3%) | 53% | 49–55 | Significant |
Site of arthroplasty | ||||
Right | 18 (43.9%) | 71% | 69–76 | n/s |
Left | 22 (53.6%) | 77% | 73–84 | n/s |
Bilateral | 01 (2.43%) | 81% | 77–82 | n/s |
Body mass index (BMI) | ||||
> 30 | 17 (41.4%) | 79% | 77–82 | n/s |
< 30 | 24 (58.5%) | 84% | 79–86 | n/s |
ASA score | ||||
Class 2 | 12 (29.2%) | 81% | 78–84 | n/s |
Class 3 | 29 (70.7%) | 85% | 81–87 | n/s |
Indications for rotating hinge knee (RHK) surgery | ||||
Global instability | 11 (26.8%) | 87% | 82–88 | n/s |
Aseptic loosening | 25 (60.9%) | 70% | 69–73 | n/s |
PJI | 02 (4.87%) | 82% | 79–81 | n/s |
Complex primary | 03 (7.31%) | 84% | 80–88 | n/s |