Table 1.

Clinical features.

Clinical features	Training set			Test set
	Effective group	Ineffective group	P-value	Effective group	Ineffective group	P-value
Age (mean ± SD)	18.49 ± 9.871	14.73 ± 9.331	0.171	17.14 ± 8.326	13.65 ± 8.141	0.243
Tumor size (mean ± SD) (cm)	11.79 ± 4.721	9.1550 ± 4.06873	0.406	12.82 ± 4. 324	10.01 ± 3.987	0.591
Tumor site Thigh bone Tibia Humerus	36 (35.29%) 16 (15.69%) 7 (6.86%)	15 (14.71%) 5 (4.90%) 2 (1.96%)	0.315	9 (8.82%) 2 (1.96%) 1 (0.98%)	6 (5.88%) 2 (1.96%) 1 (0.98%)	0.478
With pathological fracture	21 (20.59%)	13 (12.75%)	0.734	6 (5.88%)	3 (2.94%)	0.565
Surgical stage			0.013			0.025
II	47 (46.08%)	12 (11.76%)		9 (8.82%)	5 (4.90%)
III	12 (11.76%)	10 (9.80%)		3 (2.94%)	4 (3.92%)