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Mean IGV and variance in Caucasian and African Americans and associations with BMI (A, B) and hypertension (C, D). Black bars represent African Americans and white bars Caucasian Americans. BMI categories were defined as lean (BMI from 20.00 to 24.99 kg/m2), overweight (BMI from 25.00 to 29.99 kg/m2) and obese (BMI ≥30.00 kg/m2). *P < 0.05.
