*Each hazard ratio was computed using a restricted cubic spline model
with the median R-wave Onset to R-peak (A) value of 24 ms as the
reference, and for R-peak to R-wave End (B), a median value of 18
ms was used as the reference. Models included the following; age, sex, race,
heart rate, smoking, systolic blood pressure, diabetes, body mass index,
low-density lipoprotein cholesterol, antihypertensive medication use, and left
ventricular hypertrophy. Dotted-lines represent the 95% confidence
interval.