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. Author manuscript; available in PMC: 2016 Sep 1.
Published in final edited form as: Am Heart J. 2015 Jun 14;170(3):498–505.e2. doi: 10.1016/j.ahj.2015.06.007

Figure 1.

Figure 1

Multivariable-adjusted restricted cubic splines relating (a) BMI (b) abdominal circumference and risk of AF in whites and blacks participants of the Health ABC cohort. A BMI of 27 mg/kg2 and an abdominal circumference of 99 cm were used as a reference since they represent the median of each variable’s distribution. The solid line demonstrates a progressively increased AF risk in whites and the dashed line demonstrates a progressively increased AF risk in blacks. AF risk increases linearly as BMI and abdominal circumference increase, while there is no significant interaction by race. The shaded areas indicate the 95% confidence intervals.