Accuracy of dual-contrast gastrointestinal ultrasonography in predicting lymph node metastasis in older adults with gastric cancer

Table 3 Efficacy analysis of gastrointestinal dual-contrast ultrasonography examination enhancement time, time to peak, wash-in rate, and combined diagnosis for gastric cancer lymph node metastasis

Index	Sensitivity	Specificity	Youden index	AUC value	95%CI	Cut-off value
ET	0.615	0.807	0.421	0.792	0.708-0.891	16.32
TTP	0.930	0.569	0.495	0.776	0.684-0.867	10.67
WIR	0.725	0.961	0.676	0.751	0.604-0.904	7.02
Combined diagnosis	0.782	0.748	0.535	0.836	0.769-0.932	-

ET: Enhancement time; TTP: Time to peak; WIR: Wash-in rate; AUC: Area under the curve.