Why the study?
Are ambulatory arterial stiffness index (AASI), pulse wave velocity (PWV), and augmentation index (AIx) interchangeable measures of arterial stiffness in hypertensive patients?
Are ambulatory arterial stiffness index (AASI), pulse wave velocity (PWV), and augmentation index (AIx) interchangeable measures of arterial stiffness in hypertensive patients?
AASI, PWV, and AIx are not interchangeable measures of arterial stiffness, as their univariate correlations are negated by age adjustment and prediction limits are wide.
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AASI should not substitute for PWV or AIx in hypertensive patients; leaves open whether age-adjusted longitudinal data can establish interchangeability.
Jerrard-Dunne et al. (2008) studied this question.
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