A comparison of ultrasound and clinical examination in the detection of flexor tenosynovitis in early arthritis

Table 2 Comparison of Clinical examination and US (gold standard) for the detection of flexor tenosynovitis

Clinical examination versus US (gold standard)
	Sensitivity	Specificity	PPV	NPV	LRP	LRN
Tenderness	0.87	0.47	0.61	0.20	1.65	0.26
Crepitus	0.56	0.76	0.69	0.35	2.39	0.57
Swelling	0.25	1	1	0.41	infinity	0.75
At least one symptom	0.93	0.41	0.60	0.12	1.59	0.15
At least two symptons	0.68	0.82	0.78	0.26	3.89	0.37
All three findings	0.06	1	1	0.46	infinity	0.93
Specialist diagnostic	0.75	0.76	0.75	0.23	3.18	0.32

PPV: positive predictive value, NPV: negative predictive value, LRP: likehood ratio positive, LRN: likehood ratio negative

ISSN: 1471-2474