Table 5: Criterion values and coordinates of the receiver-operating characteristic curve for prediction of severe pain.

VASA criterionSensitivity95% CISpecificity95% CI

≥010054.1–100.000.0–8.4
>210054.1–100.054.7638.7–70.2
>383.3335.9–99.666.6750.5–80.4
>483.3335.9–99.673.8158.0–86.1
>566.6722.3–95.790.4877.4–97.3
>65011.8–88.295.2483.8–99.4
>733.334.3–77.710091.6–100.0
>900.0–45.910091.6–100.0

VASA: visual analogue scale for anxiety. Youden’s index assessed a cutoff of VASA score >4 for predicting severe pain.