Fig. 5

Decision curve analysis for nomograms predicted the radiological and pain progression of KOA. The Y axis shows the net benefit. The x axis of DCA is the threshold of the predicted probability using the nomogram to classify subjects with progression and subjects without progression. The gray line represents the hypothesis that all subjects had OA progression; the black line represents the hypothesis that none of the subjects had any progression of OA. The DCA illustrates that all models were useful between threshold probabilities of 4-70%,and the net benefit of the modelΔ24 was better than the other