Table 4 Individual and group EVPPI under all bias scenarios
Probability regraft | Relative risk | Cost regraft | Cost no regraft | Utility post surgery | Utility following regraft | Utility following no regraft | Probability regraft and relative risk | Probability regraft, relative risk, and all costs. | All costs | All utilities | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
1. Face value (base case) | 1.66 | 0.00 | 16.06 | 0.00 | 0.00 | 0.00 | 0.00 | 1.83 | 20.27 | 16.69 | 0.00 | 20.29 |
2. No bias, high uncertainty | 0.57 | 13.45 | 13.85 | 0.00 | 0.00 | 0.00 | 0.00 | 15.83 | 31.11 | 14.25 | 0.00 | 30.69 |
3. Bias in favour low-friction, high uncertainty | 0.06 | 9.96 | 12.16 | 0.00 | 0.00 | 0.00 | 0.00 | 10.94 | 26.35 | 13.20 | 0.00 | 25.02 |
4. Bias against low-friction, high uncertainty | 3.65 | 24.81 | 19.33 | 0.00 | 0.00 | 0.00 | 0.00 | 28.69 | 43.49 | 19.65 | 0.00 | 43.47 |
5. No bias, low uncertainty | 1.41 | 0.82 | 15.51 | 0.00 | 0.00 | 0.00 | 0.00 | 3.77 | 21.71 | 16.17 | 0.00 | 21.74 |
6. Bias in favour of low-friction, low uncertainty | 0.23 | 0.04 | 12.70 | 0.00 | 0.00 | 0.00 | 0.00 | 0.88 | 16.76 | 13.64 | 0.00 | 16.80 |
7. Bias against low-friction, low uncertainty | 7.05 | 7.27 | 22.81 | 0.01 | 0.00 | 0.00 | 0.00 | 14.30 | 32.63 | 23.25 | 0.00 | 32.64 |