Table 3 Efficacy comparison of radiomics, existing indicators, and nomogram

Group	Indicators	LNMr	PNI	Radscore	LNMr+PNI	Nomogram
Training set	AUC	0.793	0.710	0.933	0.838	0.960
	Sensitivity	0.776	0.658	0.862	0.793	0.948
	Specificity	0.812	0.724	0.949	0.795	0.872
	Accuracy	0.776	0.670	0.913	0.772	0.879
Validation set	AUC	0.787	0.700	0.887	0.828	0.937
	Sensitivity	0.794	0.648	0.804	0.755	0.921
	Specificity	0.775	0.755	0.924	0.841	0.836
	Accuracy	0.741	0.684	0.876	0.774	0.855
Test set	AUC	0.779	0.688	0.845	0.817	0.928
	Sensitivity	0.765	0.799	0.941	0.706	0.882
	Specificity	0.811	0.512	0.787	0.899	0.899
	Accuracy	0.776	0.705	0.800	0.808	0.861

LNMr radiologically diagnosed lymph node metastasis, PNI prognostic nutritional index, AUC area under the curve.

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