Correlation of stress radiographs to injuries associated with lateral ankle instability

Table 5 Initial analysis of the talar tilt

	Talar tilt ≥ 10°	Talar tilt < 10°	Sn (%)	Sp (%)	PPV (%)	NPV (%)
Peroneal tendonitis	13/35	9/52	59	66	37	83
Peroneal tear	5/35	1/52	83	63	14	98
Any peroneal pathology	14/35	10/52	58	67	40	81
Any OLT	15/35	27/52	36	56	43	48

The sensitivity, specificity, positive predictive value, and negative predictive value are documented for the presence or absence of peroneal pathology in relationship to the talar tilt stress radiograph. Note that given the significant inverse relationship found between osteochondral lesions of the talus and stress radiographs, the predictive statistics were inverted as well utilizing a positive test as being a talar tilt < 10°. Sn: Sensitivity; Sp: Specificity; PPV: Positive predictive value; NPV: Negative predictive value; OLT: Osteochondral lesions of the talus.