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Fig. 8. —Bar graph shows sensitivity (black), specificity
(gray), and accuracy (white) achieved by three observers
using composite criteria (score of 3 for either "absent middle
facet" sign or C sign) and individual criteria at different
thresholds for positive diagnosis of subtalar middle facet coalition. Note
highest accuracy was achieved when score of 3 for either absent middle facet
sign or C sign was considered positive for subtalar middle facet
coalition. AMF = absent middle facet sign, TB = "talar beak"
sign.
