Skip to main content

Table 6 Overall synthesis of reliability statistics

From: The reliability of WorkWell Systems Functional Capacity Evaluation: a systematic review

  All studies Level of methodological quality
  Poor Fair to good
  Acceptable Total % Acceptable Acceptable Total % Acceptable Acceptable Total % Acceptable
Inter-rater reliability          
Weight-handling and strength          
ICC 6 6 100.0% 6 6 100.0%    
κ 3 6 50.0%     3 6 50.0%
POA 16 16 100.0% 12 12 100.0% 4 4 100.0%
Total 25 28 89.3% 18 18 100.0% 7 10 70.0%
Intra-rater reliability          
Weight-handling and strength          
κ 1 1 100.0% 1 1 100.0%    
POA 7 7 100.0% 7 7 100.0%    
Total 8 8 100.0% 8 8 100.0%    
Test-retest reliability          
Weight-handling and strength          
ICC 42 44 95.5% 33 34 97.1% 9 10 90.0%
POA 4 4 100.0% 4 4 100.0%    
Total 46 48 95.8% 37 38 97.4% 9 10 90.0%
Posture and mobility          
ICC 5 17 29.4% 3 15 20.0% 2 2 100.0%
κ 10 14 71.4% 10 14 71.4%    
POA 22 24 91.7% 22 24 91.7%    
Total 37 55 67.3% 35 53 66.0% 2 2 100.0%
Locomotion          
ICC 1 2 50.0% 1 2 50.0%    
κ 1 3 33.3% 1 3 33.3%    
POA 3 4 75.0% 3 4 75.0%    
Total 5 9 55.6% 5 9 55.6%    
Balance          
POA 2 2 100.0% 2 2 100.0%    
Total 2 2 100.0% 2 2 100.0%    
Total test-retest reliability 90 114 78.9% 79 102 77.5% 11 12 91.7%
Overall reliability statistics 123 150 82.0% 105 128 82.0% 18 22 81.8%
  1. ICC, intraclass correlation coefficient; κ, kappa coefficient; POA, percentage of agreement.