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Table 4 Primary outcome: total ankle replacement or arthrodesis

From: The mid-term outcome of total ankle arthroplasty and ankle fusion in rheumatoid arthritis: a systematic review

Author

Outcome

Pre-operative outcome score

Post-operative outcome

Increase score

Effect size

 

n of evaluated RA patients

Lost to follow up

Type of ankle scoring system

Mean value

Mean SD

Range

Mean value

Mean SD

Range

  

TAA

          

van der Heide et al.

52

0%

Kofoed

-

  

73.0

16.0

21-92

  

Schutte et al.

29

0%

FFI

40.0

14.0

 

66.0

19.0

-

26.0

1.9

 

29

 

Kofoed

-

  

69.0

20.0

-

  

Nelissen et al.

15

0%

AOFAS

22.0

9.7

 

80.0

8.0

-

58.0

6.0

San Giovanni et al.

21

0%

AOFAS

-

  

81.0

-

40-92

  

Doets et al.*

76

0%

LCS

36.1

12.5

34-39

81.5

13.1

78-84

45.4

3.6

 

76

 

AOFAS

26.5

11.6

24-29

77.7

14.0

75-81

51.2

4.4

 

76

 

Kofoed

26.9

13.5

24-30

74.0

14.9

71-77

47.1

3.5

Carlsson et al.

5

0%

AOFAS

-

  

82.2

7.2

74-92

  

Bonnin et al.

29

1%

AOFAS

-

  

84.2

14.0

-

  

Anderson et al.°

22

0%

Kofoed

35.0

 

21-43

71.0

-

21-96

36.0

 
 

22

 

AOFAS

-

  

78.0

-

33-100

  
 

22

 

Mazur

-

  

72.0

-

28-91

  

Wood et al.

7

 

Kofoed

-

  

74.0

-

-

  

Mean

   

31.1

12.9

 

76.0

14.0

 

44.0

3.9

Arthrodesis

           

Anderson et al.¯

35

2%

Mazur max 90 points

-

  

61.3

12.5

23-73

  
 

35

 

AOFAS max 86 points

-

  

64.9

14.8

15-85

  

Kennedy et al.

17

15%

Mazur

24.0

-

2-30

69.0

-

5-83

45.0

 
 

17

 

Moran

28.0

-

2-32

79.0

-

17-89

51.0

 

Shinomiya et al.+

17

-

JOA score

-

  

66.8

4.1

-

  

De Palma et al.

7

0%

AOFAS

26.7

13.0

14-45

79.0

10.3

67-94

52.3

4.0

Lauge-Pedersen et al.

9

0%

Mazur

-

  

63.9

10.8

50-85

  
 

9

 

Moran

-

  

88.8

8.5

73-97

  

Stranks et al.

8

0%

Mazur

-

  

58.3

16.2

32-80

  

Moran et al.

21

0%

Mazur

-

  

61.7

7.7

48-76

  

Sowa et al.

6

 

Mazur

16.8

13.6

8-43

80.3

13.1

65-95

63.5

4.7

Mean

   

23.9

13.3

 

70.3

10.9

 

53.0

4.4

  1. * = Post-operative score was after 1 year evaluation.
  2. ° = The values are given as the median, with the range in parentheses.
  3. ¯ = Both outcome scores are adjusted to different max. score.
  4. + = Arthrodesis patients served only as control group for reviewed second generation total ankle implant.
  5. Abbreviations: AOFAS American Orthopaedic Foot & Ankle Society, FFI Foot Functional Index, JOA Japanese Orthopaedic Association.