NRI Calculator | TRUST Research Center

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Patients WITH Events

		New Model
		Low Risk	Moderate Risk	High Risk
	Low Risk				0
Old Model	Moderate Risk				0
	High Risk				0

Event Move ↑ 0

Event Move ↓ 0

✓

Patients WITHOUT Events

		New Model
		Low Risk	Moderate Risk	High Risk
	Low Risk				0
Old Model	Moderate Risk				0
	High Risk				0

Non-Event Move ↑ 0

Non-Event Move ↓ 0

Patient Totals

Total Patients WITH Events

Total Patients WITHOUT Events

Total Number of Patients

Intermediate Calculations

PE Up (P(events move up))

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PE Down (P(events move down))

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PNE Up (P(non-events move up))

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PNE Down (P(non-events move down))

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SE Event

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SE Non-Event

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New Reclassification Index (NRI)

NRI

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Absolute NRI

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Additive NRI

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NRI SE

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Z-Score

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P-Value

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Reference: Pencina, M. J., D'Agostino Sr, R. B., D'Agostino Jr, R. B., & Vasan, R. S. (2008). Evaluating the added predictive ability of a new marker: from area under the ROC curve to reclassification and beyond. Statistics in Medicine, 27(2), 157-172.

Net Reclassification Index (NRI) Calculator

Patients WITH Events

Patients WITHOUT Events

Patient Totals

Intermediate Calculations

New Reclassification Index (NRI)