Validation of an advanced practice physiotherapy model of care in an orthopaedic outpatient clinic

Table 3 Advanced practice physiotherapist diagnostic validity for selected knee disorders compared to the orthopaedic surgeons diagnosis (n=109)

	Sn [95% CI]	Sp [95% CI]	PPV [95% CI]	NPV [95% CI]	LR+[95% CI]	LR-[95% CI]
Osteoarthritis	0.95	0.99	0.98	0.97	62.9	0.05
n= 43^†	[0.85-0.99]	[0.92-1.00]	[0.88-1.00]	[0.90-0.99]	[9.0-440.6]	[0.01-0.18]
ACL tear	0.96	1.00	0.96	1.00	188.5	0.04
n= 12^†	[0.72-1.00]	[0.95-1.00]	[0.72-1.00]	[0.95-1.00]	[11.9-2998.1]	[0.003-0.59]
Meniscal injury	0.90	0.97	0.86	0.98	26.7	0.10
n=20^†	[0.70-0.97]	[0.91-0.99]	[0.65-0.95]	[0.92-0.99]	[8.7-82.0]	[0.03-0.39]
PFS	0.86	0.97	0.8	0.98	27.1	0.15
n= 14^†	[0.60-0.96]	[0.91-0.99]	[0.55-0.93]	[0.93-0.99]	[8.7-84.4]	[0.04-0.53]

^† As diagnosed by the orthopaedic surgeon.
ACL = anterior cruciate ligament, PFS=patellofemoral syndrome.
SN= sensitivity, SP=specificity, PPV= positive predictive value, NPV= negative predictive value, LR+ = positive likelihood ratio, LR- = negative likelihood ratio.

ISSN: 1471-2474