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. Author manuscript; available in PMC: 2010 Sep 1.
Published in final edited form as: Stroke. 2010 Jan 21;41(3):417–425. doi: 10.1161/STROKEAHA.109.566299

Figure 1.

Figure 1

Hazard ratio of ischemic stroke in relation to body mass index (a: black women, b: white women, c: black men, d: white men), and in relation to waist circumference (e: black women, f: white women, g: black men, h: white men) by cubic spline regression analysis, ARIC

The solid line represents the hazard ratio; dotted line, 95% confidence intervals. The reference values were set at 22 kg/m2 (a, b, c, d), and at 88 cm in women and 102 cm in men (e, f, g, h). The hazard ratios (HRs) were adjusted for age, education, smoking status, pack years, usual ethanol consumption, and physical activity. The sample for the spline analysis was truncated at the 1st and 99th percentile of body mass index.