Table 5 Factors affecting treatment outcomes in children with primary malignant bone tumors

Age

Under 5 years

3(60%)

1(20%)

1(20%)

0.687

5 to 10 years

22(47.8%)

10(21.7%)

14(30.4%)

11 to 15 years

19(43.2%)

15(34.1%)

10(22.7%)

Sex

Male

23(46%)

15(30%)

12(24%)

0.784

Female

21(46.7%)

11(24.4%)

13(28.9%)

Duration of illness

< 1 year

40(44.9%)

24(27%)

25(28.1%)

0.392

1 to 5 years

2(50%)

2(50%)

0(0%)

Primary site occurrence

lower extremities

23(43.4%)

17(32.1%)

13(24.5%)

0.078

pelvis

2(22.2%)

2(22.2%)

5(55.6%)

shoulder

8(80%)

1(10%)

1(10%)

upper extremities

8(66.7%)

1(8.3%)

3(25%)

others

3(27.3%)

5(45.5%)

3(27.3%)

Histologic finding

osteosarcoma

25(39.7%)

22(34.9%)

16(25.4%)

0.05

Ewing sarcoma

19(59.4%)

4(12.5%)

9(28.1%)

Stage of disease at diagnosis

localized

21(37.5%)

21(37.5%)

14(25%)

0.023

metastasis

23(59%)

5(12.8%)

11(28.2%)