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Table 1 Main characteristics of the studies analyzed; numbers in the first column refer to pre- versus post-arthroplasty comparisons with different subjects, and letters to different post-operative measurement times

From: The effects of knee arthroplasty on walking speed: A meta-analysis

  Study (reference) N a Arthro-
plastyb
Time post
(months)h
Distance walked (m) Walking Speed Gender
m/fi
Agej BMIj
       pre post    
1 Berman, 1987 [41] B 16 A 16 TKA 18 3.8 0.58 ± 0.2 0.83 ± 0.2 NA 64.80  
2   B 12 A 12 TKAc 24 = 0.59 ± 0.2 0.71 ± 0.3 NA   
3a Kroll, 1989 [42] B 18 A 18 TKA 5 10 0.84 ± 0.2 0.98 ± 0.2 7/11 68 27.43
3b   B 18A 18 = 13 = 0.84 ± 0.2 1.07 ± 0.1 =   
4 Mattsson, 1990 [43] B 20A 20 UKA 12 249.6 1.04 ± 0.2 1.24 ± 0.1 11/9 63 ± 4.5  
5 Ivarsson, 1991 [44] B 10A 10 UKA 6 10 0.83 ± 0.3 0.93 ± 0.2 4/6 64 ± 5  
6 Weidenhielm, 1993 [36] B 36A 36 UKA 12 5 1.03 ± 0.2 1.19 ± 0.2 18/18 64 ± 5 28.1
7 Weidenhielm, 1993 [39] B 19A 19 UKAd 3 5 1.13 ± 0.1 1.14 ± 0.1 11/8 64 ± 4 30.08
8   B 20A 20 UKA 3 = 1.09 ± 0.2 1.17 ± 0.1 11/9 63 ± 5 29.07
9a Fusi, 2002 [45] B 16A 13 TKA 2 255 0.85 ± 0.2 0.81 ± 0.2 13/3 NA 72 ± 3.6 29.6 ± 5.2
9b   B 16A 8 = 6 243 0.85 ± 0.2 1.07 ± 0.2 =   
9c   B 16A 10 = 12 321 0.85 ± 0.2 0.98 ± 0.2 =   
10a Parent, 2002 [46] B 65A 65 TKA 2 10 0.80 ± 0.3 0.70 ± 0.2 25/40 68.6 ± 8.7 31.2 ± 5.6
10b   B 65A 64 = 4 = 0.80 ± 0.3 0.90 ± 0.3 25/40 24/40   
11a Lamb,
2003 [47]
B 79A 68 mixed 3 5 1.10 ± 0.5 1.34 ± 0.4 40/39 36/32 71.1 ± 6.4 29.0 ± 3.9
11b   B 79A 57 = 6 = 1.10 ± 0.5 1.45 ± 0.5 40/39 29/28   29.1 ± 3.8
12a Börjesson, 2005 [37] B 22A 22 UKA 3 5 1.07 ± 0.2 1.16 ± 0.2 11/11 63 ± 4 28.0
12b   B 22A 22 = 12 = 1.07 ± 0.2 1.24 ± 0.2 =   
12c   B 22A 22 = 60 = 1.07 ± 0.2 1.19 ± 0.2 =   
13 Mandeville, 2007 [38] B 21A 21 TKA 6 10 0.89 ± 0.2 1.05 ± 0.2 6/15 62.6 ± 7.3 32.6 ± 5
14a Rahmann, 2009 [40] B 20A 17 TKAe 0.5 = 0.71 ± 0.4 0.49 ± 0.3 NA 5/12 70.4 ± 9.2 28.8 ± 6.2
14b   B 20A 17 = 3 = 0.71 ± 0.4 1.00 ± 0.4 =   
14c   B 20A 17 = 6 = 0.71 ± 0.4 0.98 ± 0.3 =   
15a   B 24A 17 TKAf 0.5 10 0.99 ± 0.2 0.67 ± 0.3 NA 69.4 ± 6.5 28.4 ± 4.6
15b   B 24A 17 = 3 = 0.99 ± 0.2 1.14 ± 0.3 NA   
15c   B 24A 14 = 6 = 0.99 ± 0.2 1.25 ± 0.3 NA   
16a   B 21A 19 TKAg 0.5 10 0.76 ± 0.4 0.57 ± 0.2 NA 69 ± 8.9 28.0 ± 4.1
16b   B 21A 19 = 3 = 0.76 ± 0.4 1.03 ± 0.3 NA   
16c   B 21A 17 = 6 = 0.76 ± 0.4 1.09 ± 0.2 NA   
  1. = Same as immediately above.
  2. NA not available in the paper.
  3. a N number of subjects, B before surgery, A after surgery.
  4. b TKA total knee arthroplasty, UKA unicompartmental knee arthroplasty.
  5. c Patients also having contralateral radiographic signs of knee osteoarthritis.
  6. d Patients undergoing post-operative physiotherapy.
  7. e Standard post-operative care ("ward ").
  8. f Post-operative aquatic treatment.
  9. g Post-operative water exercises.
  10. h Number of months after the operation (post-operative measurement).
  11. i m male, f female.
  12. j Left blank where no information was given.
  13. Where relevant, data are given as mean ± standard-deviation.