Table 3.

Race specific multivariable associations between stroke risk factors and total stroke, HR (95% CI)

Stroke Risk Factors	White Women		Black Women
	Events	HR (95% CI)	Events	HR (95% CI)	Pinteraction
Smoker					0.90
Never	1961	1.00	199	1.00
Former	1634	1.06 (0.99–1.13)	148	0.98 (0.79–1.22)
Current	286	1.83 (1.61–2.09)	57	1.68 (1.24–2.29)
Hypertension					0.14
No hypertension	1957	1.00	125	1.00
Hypertensive non-treated	368	1.38 (0.69–2.76)	45	0.98 (0.14–7.08)
Hypertensive treated	1343	1.51 (0.68–3.38)	209	1.18 (0.13–10.77)
Antihypertensive medication*	1367	1.02 (0.67–1.55)	213	0.68 (0.24–1.90)	0.06
Use of cholesterol lowering medication	521	0.93 (0.84–1.02)	61	0.98 (0.74–1.30)	0.88
Diabetes	302	1.59 (1.41–1.80)	84	1.66 (1.29–2.14)	0.92
Atrial fibrillation	318	1.64 (1.46–1.84)	37	1.92 (1.36–2.71)	0.59
Family history of stroke	1665	1.16 (1.09–1.24)	157	0.90 (0.74–1.11)	0.01
Physical activity ≥150 min/week	935	0.86 (0.80–0.93)	66	1.01 (0.77–1.32)	0.30
BMI ≥30 kg/m2	1122	1.01 (0.94–1.09)	213	1.02 (0.83–1.25)	0.61

p<0.05 indicated in bold.

^*Among hypertensive women.

Adjusted for covariates in Model 3 of Table 2, except for stratification factor.

Reference groups are the complement of the indicated category unless otherwise indicated.