Fragility index values predicting precision
| Precision criteria | FI cutpoint | Sensitivity (%) | Specificity (%) | AUC | 95% lower limit | 95% upper limit |
| CI boundary closest to null ≥0.05 | ≥9 | 69.59 | 67.92 | 0.80 | 0.73 | 0.86 |
| Sample size powered to RRR 25% | ≥12 | 77.65 | 63.79 | 0.75 | 0.68 | 0.82 |
| Sample size powered to RRR 30% | ≥12 | 75.00 | 70.97 | 0.75 | 0.69 | 0.82 |
| CI boundary ≥5% and RRR 25% | ≥22 | 81.48 | 83.67 | 0.90 | 0.86 | 0.94 |
| CI boundary ≥5% and RRR 30% | ≥19 | 81.43 | 82.44 | 0.90 | 0.86 | 0.94 |
AUC, area under the receiver operating characteristic curve; FI, fragility index; RRR, relative risk reduction.