Table 3. Concordance index values of the relapse-related lncRNA signature and other clinical feature for prognosis prediction.

	C-index
Variables	Discovery dataset	Testing dataset	Okayama dataset	Der dataset	Botling dataset
lncRNA signature	0.876	0.761	0.822	0.677	0.657
Age	0.608	0.498	0.556	0.528	0.514
Gender	0.567	0.490	0.536	0.536	0.534
Stage	0.671	0.590	0.635	0.591	0.585
Smoking	0.561	0.525	0.544	0.531	-

“-” means no corresponding information available in this dataset.