Table 4. Sensitivity, specificity, PPV, and NPV for DEFAB cut-offs of ⩾3 and ⩾5.

	DEFAB score ⩾3, estimate (95% CI)	DEFAB score ⩾5, estimate (95% CI)
Sensitivity	81.9% (74.7–87.7%)	67.8% (59.6–75.2%)
Specificity	50.1% (48.2–51.9%)	74.1 (72.5–75.7%)
ROC area	0.660 (0.627–0.692)	0.710 (0.671–0.748)
PPV	7.78% (6.50–9.21%)	11.9% (9.77–14.2%)
NPV	98.2% (97.4–98.8%)	97.8% (97.1–98.4%)

Abbreviations: CI=confidence interval; NPV=negative predictive value; PPV=positive predictive value; ROC=receiver operating characteristic curve.