Table 7. Survival analysis according to age and risk group.

Variables	5-yr EFS							5-yr OS
	Risk group				Stage			Risk group				Stage
	Low	Intermediate	High	P value	Limited	Advanced	P value	Low	Intermediate	High	P value	Limited	Advanced	P value
Children	93.0 ± 3.4	90.9 ± 6.1	83.9 ± 8.5	0.731	92.1 ± 5.3	88.6 ± 4.8	0.812	100	100	88.9 ± 7.4	0.057	100	95.2 ± 3.3	0.160
Adolescent	80.4 ± 7.3	88.7 ± 4.8	82.4 ± 9.2	0.801	84.1 ± 6.6	85.2 ± 4.6	0.873	96.9 ± 3.1	97.5 ± 2.5	92.3 ± 7.4	0.606	100	94.6 ± 3.0	0.049
Young adult	84.7 ± 10.3	84.0 ± 7.5	66.7 ± 19.2	0.396	86.1 ± 9.4	79.9 ± 7.5	0.453	100	96.4 ± 3.5	60.0 ± 21.9	0.006	100	89.6 ± 5.7	0.263

Data are presented as mean ± standard deviation.

EFS = event-free survival, OS = overall survival.