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Table 6 Comparison between Cohen’s Kappa and Gwet’s AC1 according to prevalence rate

From: A comparison of Cohen’s Kappa and Gwet’s AC1 when calculating inter-rater reliability coefficients: a study conducted with personality disorder samples

PDs Prevalence rate (%) Cohen’s Kappa Gwet’s AC1 % Agreement
Avoidant 26.32 1.000 1.000 100
  18.75 1.000 1.000 100
  10.00 1.000 1.000 100
  0.0 0.0 .858 88
Dependent 12.50 1.000 1.000 100
  6.25 1.000 1.000 100
  5.26 .640 .934 95
  0.0 0.0 .890 90
Obsessive-Compulsive 31.58 .883 .904 95
  25.00 .714 .781 88
  25.00 1.000 1.000 100
  20.00 1.000 1.000 100
Passive-Aggressive 21.05 1.000 1.000 100
  12.50 .600 .820 88
  6.25 .636 .924 94
  0.0 0.0 .890 90
Depressive 12.50 1.000 1.000 100
  12.50 .765 .915 94
  10.53 .604 .857 89
  0.0 1.000 1.000 100
Paranoid 31.58 1.000 1.000 100
  6.25 1.000 1.000 100
  0.0 1.000 1.000 100
  0.0 0.0 .890 90
Schizotypal 10.00 1.000 1.000 100
  5.26 1.000 1.000 100
  0.0 1.000 1.000 100
  0.0 1.000 1.000 100
Schizoid 20.00 .737 .840 90
  15.79 .565 .752 84
  12.50 .600 .820 88
  6.25 1.000 1.000 100
Histrionic 6.25 1.000 1.000 100
  5.26 .641 .938 94
  0.0 1.000 1.000 100
  0.0 1.000 1.000 100
Narcissistic 10.00 1.000 1.000 100
  0.0 1.000 1.000 100
  0.0 1.000 1.000 100
  0.0 1.000 1.000 100
Borderline 21.05 1.000 1.000 100
  12.50 1.000 1.000 100
  12.50 1.000 1.000 100
  10.00 .615 .866 90
Total Antisocial 12.50 1.000 1.000 100
  6.25 1.000 1.000 100
  5.26 .441 .870 89
  0.0 1.000 1.000 100