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Table 3 Concordance between the physiotherapist and physicians’ composite or imaging only diagnoses (n = 179)

From: Diagnostic validity and triage concordance of a physiotherapist compared to physicians’ diagnoses for common knee disorders

  Raw agreement Cohen’s kappa 95% CI Bias Index Prevalence Index PABAK
Overall concordance with the physicians’ composite diagnoses 92.2% (165/179) 0.89 0.83–0.94
 ACL injury 100.0% (8/8) 0.94 0.82–1.00 0.01 0.91 0.99
 Meniscal injury 97.2% (35/36) 0.88 0.80–0.93 0.03 0.57 0.92
 Patellofemoral pain 91.1% (41/45) 0.88 0.80–0.96 0.05 0.50 0.91
 Osteoarthritis 91.1% (72/79) 0.89 0.82–0.95 0.02 0.14 0.89
 Other knee disorders 81.8% (9/11) 0.89 0.75–1.00 0.01 0.89 0.98
Overall concordance with imaging only diagnoses 84.4% (151/179) 0.77 0.68–0.85
  1. ACL anterior cruciate ligament. 95% CI: 95% confidence interval. PABAK is only calculated only for 2 × 2 tables. Others knee diagnoses included: contusion of the tibial plateau (n = 2), PCL tear (n = 1), soleus tear (n = 1), psychosomatic origin (n = 1), muscular spasms linked to multiple sclerosis (n = 1), hamstring tendinopathy (n = 3), medial collateral ligament injury (n = 1), functional instability in the absence of ACL or meniscal injury (n = 1)