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Table 1 General characteristic of the included studies

From: Platelet-rich plasma versus hyaluronic acid in the treatment of knee osteoarthritis: a meta-analysis

Author

Country

No. of patients (PRP vs HA)

Age (years, PRP vs HA)

Sex (male, PRP vs HA)

BMI (PRP vs HA)

Radiographic classification (PRP vs HA)

Follow-up (m)

0

I

II

III

IV

Ahmad 2018 [22]

Egypt

45/44

56.2/56.8

14/14

NS

0/0

8/7

17/19

20/18

0/0

6

Buendia-Lopez 2018 [23]

Spain

33/32

56.2/56.6

16/15

24.9/24.9

0/0

18/18

15/14

0/0

0/0

12

Cerza 2012 [24]

Italy

60/60

66.5/66.2

25/28

NS

0/0

21/25

24/22

15/13

0/0

6

Cole 2017 [20]

USA

49/50

55.9/56.8

28/20

27.4/29

0/0

3/0

26/27

20/22

0/0

12

Di Martino 2019 [25]

Italy

85/82

52.7/57.5

53/47

27.2/26.8

NS

    

60

Duymus 2017 [26]

Turkey

33/34

60.4/60.3

1/1

27.6/28.4

0/0

0/0

22/24

21/10

11/0

12

Filardo 2015 [19]

Italy

94/89

53.3/57.6

60/52

26.6/26.9

NS

NS

NS

NS

NS

12

Gormeli 2017 [27]

Turkey

39/39

53.7/53.5

16/17

28.7/29.7

0/0

26/30

13/14

6

Huang 2019 [28]

China

40/40

54.5/54.8

25/19

25.2/24.5

0/0

40/40

0/0

0/0

12

Li 2011 [29]

China

15/15

57.6/58.2

6/7

24.3/21.0

0/0

6/6

2/3

4/3

3/3

6

Lin 2019 [17]

China

31/29

61.2/62.5

9/10

24.0/26.3

5/6#

16/14#

10/9#

  

12

Louis 2018 [30]

France

24/24

53.2/48.5

14/11

25.6/27.0

0/0

0/0

24/24

6

Montanez-Heredia 2016 [31]

Spain

27/26

66.3/61.5

12/9

29.0/30.4

0/0

5/2

10/9

12/15

0/0

6

Paterson 2016 [32]

Australia

11/10

49.9/52.7

8/7

27.9/28.9

0/0

0/0

11/10

0/0

3

Raeissadat 2015 [33]

Iran

77/62

56.9/61.1

8/15

28.2/27.0

0/0

5/0

34/29

29/23

9/10

12

Sanchez 2012 [34]

Spain

89/87

60.5/58.9

43/42

27.9/28.2

45/43#

32/33#

12/11#

  

6

Su 2018 [35]

China

25/30

54.2/53.1

11/12

28.2/28.7

0/0

0/0

16/13

11/12

0/0

6

Vaquerizo 2013 [36]

Spain

48/48

62.4/64.8

16/22

30.7/31.0

NS

NS

   

12

Yu 2018 [37]

China

104/88

46.2/51.5

50/48

NS

NS

NS

   

12

Tavassoli 2019 [38]

Iran

28/27

63.2/66.0

5/8

28.4/28.9

 

21/22

35/32

  

3

  1. NS not stated, PRP platelet-rich plasma, HA hyaluronic acid
  2. # Ahlbäck grade, and the rest were K–L grades