Table 4.

AUC of training group and validation group.

	SEER data (Training group)			Multicenter data (validation group)
Variable	AUC	SE	95% CI	AUC	SE	95% CI
Chemotherapy	0.631	0.0226	0.602 to 0.659	0.583	0.0541	0.486 to 0.676
Lung metastases	0.697	0.0239	0.669 to 0.723	0.631	0.0644	0.535 to 0.721
M	0.592	0.0221	0.563 to 0.621	0.603	0.062	0.506 to 0.694
Surgery	0.667	0.0225	0.639 to 0.694	0.656	0.0619	0.561 to 0.743
T	0.706	0.0256	0.678 to 0.732	0.728	0.0614	0.635 to 0.807
Nomogram	0.805	0.0231	0.781 to 0.827	0.808	0.065	0.723 to 0.877