Online Table 5:

Net reclassification of 10-year cardiovascular disease risk into low (<7.5%) and high (≥7.5%) risk groups, comparing model A (based on established CVD risk factors) to model B (based on established CVD risk factors plus hypertensive disorders of pregnancy and parity) among women with incident CVD and those without incident CVD

	Model B: Established CVD Risk Factors
	Plus Hypertensive Disorders of Pregnancy and Parity
	Categories of Predicted 10-Year Risk
Model A: Established CVD Risk Factors	Low Risk:	High Risk:	Total
Categories of Predicted 10-Year Risk	<7.5%	≥7.5%	Reclassified
Women with incident CVD (n=685)
Low Risk: <7.5%
N	682	2	2
% Reclassified	---	0.3	0.3
High Risk: ≥7.5%
N	0	1	---
% Reclassified	---	---	---
Women without incident CVD (n=105,545)
Low Risk: <7.5%
N	105,500	13	13
% Reclassified	---	0.01	0.01
High Risk: ≥7.5%
N	5	27	5
% Reclassified	15.6	---	15.6

Abbreviation: CVD: cardiovascular disease. Established risk factors include age, total cholesterol, high-density lipoprotein cholesterol, systolic blood pressure, anti-hypertensive medication use, current smoking, and diabetes. NRI = 0.003; 95% CI: -0.0001, 0.006; P = 0.14. NRI for events = 0.003; 95% CI: 0.000, 0.006; P = 0.13. NRI for non-events = -0.0001; 95% CI: -0.0002, -0.000001; P = 0.04.