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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.