表 3. Diagnostic value of WLI and EUS for the invasion depth of EGC.

WLI、EUS及联合检查对EGC的诊断价值分析

Endoscopy	Accuracy/%	Overestimate/%	Underestimate/%	Sensitivity/%	Specificity/%	PPV/%	NPV/%
PPV: Positive predictive value; NPV: Negative predictive value. *P<0.05, vs. WLI and WLI+EUS.
WLI	87.0	4.8	8.2	94.2	50.0	90.6	63.0
EUS	46.4*	52.2*	1.5*	37.6*	91.2*	95.6	22.3*
WLI+EUS	87.4	3.4	9.2	96.0	44.1	89.7	68.2