Table 2.
Maintaining Cost of Vancomycina and the Cost of Treating Infection Constant Does Not Change Cost-Effectiveness.
| Initial Infection Rateb (%) | Laminectomy | Laminectomy and Fusion | ||
|---|---|---|---|---|
| Final Infection Rate (%) | ARR (%) | Final Infection Rate (%) | ARR (%) | |
| 0.50 | 0.49 | 0.0145 | 0.50 | 0.0034 |
| 1 | 0.99 | 0.0145 | 1.00 | 0.0034 |
| 2 | 1.99 | 0.0145 | 2.00 | 0.0034 |
| 3 | 2.99 | 0.0145 | 3.00 | 0.0034 |
| 4 | 3.99 | 0.0145 | 4.00 | 0.0034 |
| 5 | 4.99 | 0.0145 | 5.00 | 0.0034 |
| 6 | 5.99 | 0.0145 | 6.00 | 0.0034 |
| 7 | 6.99 | 0.0145 | 7.00 | 0.0034 |
| 8 | 7.99 | 0.0145 | 8.00 | 0.0034 |
| 9 | 8.99 | 0.0145 | 9.00 | 0.0034 |
| 10 | 9.99 | 0.0145 | 1.00 | 0.0034 |
Abbreviation: ARR, absolute risk reduction.
a Cost of vancomycin $3.06 per gram at our institution.
b Presumes cost of treating infection is $21 060 for laminectomy and $90 938 for laminectomy and fusion.