Changes in cervical elastography, cervical length and endocervical canal width after cerclage for cervical insufficiency: an observational ultrasound study

Table 3 ROC curve analyses of second-trimester cervical elastography, cervical length and endocervical canal width for the diagnosis of cervical insufficiency

	Cut-off value	Sensitivity	Specificity	AUC	95% CI	P value
Anterior cervical lip strain rate	0.14%	0.88	0.55	0.76	0.66–0.85	< 0.001*
Posterior cervical lip strain rate	0.09%	0.79	0.58	0.69	0.59–0.79	0.002*
Cervical length	37.4 mm	0.66	0.71	0.67	0.57–0.78	0.005*
Endocervical canal width				0.58	0.46–0.71	0.186

ROC, receiver operating characteristic; AUC, area under the curve; CI, confidence interval
*P < 0.05 was considered statistically significant

ISSN: 1471-2393