Patients’ Experience of Anxiety and Pain during Retrobulbar Injections prior to Vitrectomy

Table 5

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

VASA criterion	Sensitivity	95% CI	Specificity	95% CI
≥0	100	54.1–100.0	0	0.0–8.4
>2	100	54.1–100.0	54.76	38.7–70.2
>3	83.33	35.9–99.6	66.67	50.5–80.4
>4	83.33	35.9–99.6	73.81	58.0–86.1
>5	66.67	22.3–95.7	90.48	77.4–97.3
>6	50	11.8–88.2	95.24	83.8–99.4
>7	33.33	4.3–77.7	100	91.6–100.0
>9	0	0.0–45.9	100	91.6–100.0

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