Endoscopic ultrasound elastography for malignant pancreatic masses and associated lymph nodes: Critical evaluation of strain ratio cutoff value

Table 3 Qualitative and quantitative diagnostic accuracy of endoscopic ultrasound elastography for detecting malignant pancreatic masses: All lesions (n = 121) and only solid pancreatic masses (n = 85)

	EUS-elastography qualitative analysis		EUS-elastography quantitative analysis
	All masses	Only solid pancreatic masses	All PMs		Only solid PMs
			SR ≥ 21.51	SR ≥ 121.02	SR ≥ 21.51	SR ≥ 121.02
Sensitivity (%)	100.0	100.0	94.2	14.5	90.7	14.0
Specificity (%)	21.2	23.8	40.4	96.2	47.6	95.4
PPV (%)	62.7	57.3	67.7	83.3	63.9	70.0
NPV (%)	100.0	100.0	84.0	45.9	83.3	52.0
Accuracy (%)	66.1	62.4	71.1	49.6	69.4	54.1

¹Internally derived optimal strain ratio (SR) cutoff for sensitivity (and accuracy).

²Internally derived optimal SR cutoff for specificity.

EUS: Endoscopic ultrasound; SR: Strain ratio; PPV: Positive predictive value; NPV: Negative predictive value; PM: Pancreatic masses.