Table 2

Fragility index values predicting precision

Precision criteriaFI cutpointSensitivity (%)Specificity (%)AUC95% lower limit95% upper limit
CI boundary closest to null ≥0.05≥969.5967.920.800.730.86
Sample size powered to RRR 25%≥1277.6563.790.750.680.82
Sample size powered to RRR 30%≥1275.0070.970.750.690.82
CI boundary ≥5% and RRR 25%≥2281.4883.670.900.860.94
CI boundary ≥5% and RRR 30%≥1981.4382.440.900.860.94
  • AUC, area under the receiver operating characteristic curve; FI, fragility index; RRR, relative risk reduction.