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Simulated reclassification tables comparing two prediction models. Net reclassification index (NRI)=Proportion of cases who were reclassified into higher category (11.7+1.7+1.0=14.4%)-Proportion of cases who were reclassified into lower category (0.7+0.3+0.7=1.7%)+Proportion of controls who were reclassified into lower category (0.8+0.3+0.5=1.6%)-Proportion of controls who were reclassified into higher category (3.3+0.8+0.5=4.6%)=9.8%.
