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. 2020 Mar 25;20:78. doi: 10.1186/s12876-020-01206-1

Fig. 2.

Fig. 2

PPV and NPV for different thresholds of risk for the prediction model applied to those with negative results and with two year follow up. A PPV of 3% corresponds to a risk probability threshold of 0.0168. The plot displays the locally weighted regression lines of PPV and NPV against the risk probability determined from the model