Table 1.

ROC analyses thresholds and results.

Cut-off (no. of amplicons)	Sensitivity%	95% CI	Specificity%	95% CI	Likelihood ratio
>0.5000	100.0	81.5–100.0%	70	47–87%	3.29
>1.5	100.0	81.5–100.0%	74	52–90%	3.83
>2.5	100.0	81.5–100.0%	78	56–93%	4.6
>4	100.0	81.5–100.0%	91	72–99%	11.5
>5.5	100.0	81.5–100.0%	96	78–99.9%	23
>16.5	100.0	81.5–100.0%	100.0	81.5–100.0%
>30.5	95	74–99%	100.0	81.5–100.0%
>37	89	65–98%	100.0	81.5–100.0%
>50.5	84	59–96%	100.0	81.5–100.0%
>62	78	52–93%	100.0	81.5–100.0%
>68	72	47–90%	100.0	81.5–100.0%
>73.5	67	41–87%	100.0	81.5–100.0%
>74.5	61	36–83%	100.0	81.5–100.0%
>76	50	26–74%	100.0	81.5–100.0%
>77.5	28	10–53%	100.0	81.5–100.0%

CI, confidence interval. The bold values stand for the threshold identified for classifying samples into HPV +ve and -ve using the ROC analysis.