Table 3.

Diagnostic performance of the clinical model and the radiomics nomogram in identifying FPT candidate patients

Model	Group	SPE	SEN	ACC	AUC (95% CI)	P value*
Clinical model	Primary	72.6%	53.3%	68.9%	0.63 (0.53-0.73)
	Validation 1	68.6%	54.5%	66.7%	0.62 (0.45-0.78)
	Validation 2	85.0%	54.5%	78.4%	0.69 (0.53-0.86)
Radiomics nomogram	Primary	75.0%	86.7%	77.2%	0.86 (0.80-0.93)	<0.001
	Validation 1	65.7%	90.9%	69.2%	0.82 (0.71-0.93)	0.048
	Validation 2	75.0%	100%	80.3%	0.94 (0.87-1.00)	0.002

^*comparison between clinical model with radiomics nomogram in the primary group and the validation groups.

ACC, accuracy; AUC, area under the curve; CI, confidence interval; SEN, sensitivity; SPE, specificity.