Table 1 Correlation expression of S100A9 in osteosarcoma tissues and normal human bone tissues

Tissue

 Normal tissue (n = 40)

0

0

8

32

0.000

 Osteosarcoma tissue (n = 120)

6

73

35

6

Gender

 Male (n = 71)

4

46

17

4

0.210

 Female (n = 49)

2

27

18

2

Age

  > 25 (n = 47)

1

28

16

2

0.378

  < 25 (n = 73)

5

45

19

4

Site

 Femur (n = 73)

4

46

20

3

0.086

 Tibiofibula (n = 23)

2

15

5

1

 Other sites (n = 24)

0

12

10

2

Clinical stage

 IA (n = 25)

0

6

15

4

0.000

 IB (n = 16)

1

8

5

2

 IIA (n = 38)

2

30

6

0

 IIB (n = 32)

1

24

7

0

 III (n = 9)

2

5

2

0