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Fig. 4 —Plot of aortic attenuation (H) versus body mass index (BMI).
Relatively strong inverse correlation existed between aortic attenuation and
BMI (r = –0.63, 
= –0.64, p < 0.001).
This indicates aortic attenuation is reduced in patients with higher BMI.
Regression formula was aortic attenuation (H) = 529–6.8 BMI (p
< 0.001). + = low-BMI group (BMI < 30), o = high-BMI group (BMI 
30). Ninety-five percent CIs (dotted fitting lines) are fit to
regression line (solid fitting line).
