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Fig. 3 | Journal of Orthopaedic Surgery and Research

Fig. 3

From: Vertebral mobility is a valuable indicator for predicting and determining bone union in osteoporotic vertebral fractures: a conventional observation study

Fig. 3

ROC curves at 5 weeks after OVF. ROC curves were used to investigate the relationships between anterior vertebral mobility and bone union (including semi-union) at 6 months after OVF. Bone union was determined by cutoff values for anterior vertebral mobility of 1.0 mm (a), 1.5 mm (b), and 2.0 mm (c). The distance from the top left corner of the ROC curve was used to estimate the cutoff values for predicting bone union at 6 months after OVF, which are shown in Table 4. ROC, receiver-operating characteristic; OVF, osteoporotic vertebral fracture; TPF, true-positive fraction; FPF, false-positive fraction

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