Endoscopic ultrasonography for staging of T1a and T1b esophageal squamous cell carcinoma

Table 2 Accuracy of endoscopic ultrasound for staging T1a or T1b esophageal squamous cell carcinoma

Pathology	Expert 1		Expert 2		Common results
	T1a (n = 36)	T1b (n = 36)	T1a (n = 39)	T1b (n = 33)	T1a (n = 36)
T1a (n = 35)	23	13	25	10	26
T1b (n = 37)	13	24	14	23	10
Group
AC	65.30%		66.70%		70.80%
SE	65.70%		64.10%		74.30%
FPR	35.10%		35.90%		27.00%
FNR	34.30%		30.30%		25.70%
SP	64.90%		69.70%		73.00%
PPV	63.90%		71.40%		72.20%
NPV	66.70%		62.20%		75.00%
AUC	0.653		0.668		0.736
P value	0.026		0.014		0.001

AC: Accuracy; SE: Sensitivity; FPR: False positive rate; FNR: False negative rate; SP specificity; PPV: Positive predictive value; NPV: Negative predictive value. AUC: Area under the curve.