Table 2.

Prediction of survival in the training group and the test group

Survival	Statistics	Training group (n = 41)	Test group (n = 22)
1-year survival	AUC	0.850 (0.555–1.000)	0.694 (0.469–0.919)
	Sensitivity	80.0 (28.4–99.5)	100.0 (47.8–100.0)
	Specificity	100.0 (90.3–100.0)	47.1 (23.0-72.2)
	PPV	100.0 (39.8–100.0)	35.7 (12.8–64.9)
	NPV	97.3 (85.8–99.9)	100.0 (63.1–100.0)
2-year survival	AUC	0.845 (0.722–0.968)	0.909 (0.784–1.000)
	Sensitivity	81.0 (58.1–94.6)	100.0 (71.5–100.0)
	Specificity	85.0 (62.1–96.8)	72.7 (39.0–94.0)
	PPV	85.0 (62.1–96.8)	78.6 (49.2–95.3)
	NPV	81.0 (58.1–94.6)	100.0 (63.1–100.0)
3-year survival	AUC	0.819 (0.670–0.969)	0.835 (0.661–1.000)
	Sensitivity	78.1 (60.0–90.7)	70.6 (44.0–89.7)
	Specificity	88.9 (51.8–99.7)	100.0 (47.8–100.0)
	PPV	96.2 (80.4–99.9)	100.0 (73.5–100.0)
	NPV	53.3 (26.6–78.7)	50.0 (18.7–81.3)

AUC: area under the curve; NPV: negative predictive value; PPV: positive predictive value.