. Author manuscript; available in PMC: 2009 Jul 20.

Published in final edited form as: Vasc Med. 2008 Aug;13(3):225–233. doi: 10.1177/1358863X08091338

Table 1.

List of terms used in this manuscript

Leg-specific ABI

ABI calculated according to the American Heart Association algorithm² for an individual leg. This is the ratio of the higher of the two ankle SBP measurements (posterior tibial versus dorsal pedis) divided by either the average of the right and left brachial artery pressures, or if there is a discrepancy then the higher of the two brachial values. When replicate measurements are taken at sites, their average is used for the site-specific SBP.

Minimum ABI

Lowest of two leg-specific ABIs.

Average leg ABI

Average of two leg-specific ABIs.

True ABI

Value that ABI would take on if there were no SBP measurement error: in the special case in which there are no differences in the underlying SBP between arms and among ankle sites, the true leg-specific, minimum, and average ABI are identical.