Fig. 7
Decision curve analysis. Legend: The Net Benefit of using the original Mirels and modified Mirels scoring schemes as a function of threshold probability of fracture (A). A ‘treat all’ line is included representing the net benefit if all cases were considered to be at high risk of fracture. As an example, for pt = 0.1 where a patient/surgeon is willing to accept a 10% chance of fracture, there was a net benefit to using the original Mirels scoring compared to treating all patients (point b). Further, there was an additional net benefit to using the modified Mirels scoring over original Mirels scoring at this threshold probability (point c). There is a net reduction in false positives using the modified Mirels scoring schemes over the original Mirels scoring (B) per 100 patients. For the example of pt = 0.1, the modified scoring schemes reduced the number of false positives by 17% for the modified Mirels-ax and 20% for modified Mirels-ss