. Author manuscript; available in PMC: 2014 Oct 10.

Published in final edited form as: Circ Cardiovasc Qual Outcomes. 2013 Apr 30;6(3):255–261. doi: 10.1161/CIRCOUTCOMES.111.000070

Table 5.

Category-Free Net Reclassification Improvement Over the Baseline Cardiovascular Risk Factors Model

Model	Overall NRI		Event NRI, %	Nonevent NRI, %
Model	NRI, %	P Value	Event NRI, %	Nonevent NRI, %
All-cause mortality
BRF^*	ref	ref	ref	ref
BRF + distance score	44.4	<0.001	9.3	35.1
BRF + stair-climbing score	47.5	<0.001	33.7	13.7
BRF + speed score	32.2	<0.001	19.8	12.4
BRF + all 3 scores	48.4	<0.001	24.4	24.0
Cardiovascular mortality
BRF	ref	ref	ref	ref
BRF + distance score	60.3	<0.001	23.4	36.9
BRF + stair-climbing score	84.0	<0.001	61.7	22.3
BRF + speed score	51.5	0.001	27.7	23.9
BRF + all 3 scores	77.4	<0.001	48.9	28.5

BRF indicates baseline risk factors; NRI, net reclassification improvement; and ref, reference.

Age, sex, race, smoking history, body mass index, systolic blood pressure, use of lipid-lowering medication, use of antihypertensive medication, diabetes mellitus status, total cholesterol, high-density lipoprotein-cholesterol, and ankle-brachial index.