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

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

	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	–	–	–

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)

ISSN: 1471-2474