Table 5.

Improvement of ABI through 3 Years

ABI	Baseline	1‐Year	2‐Year	3‐Year
Mean ± SD (N)	0.65 ± 0.15 (246)	0.89 ± 0.20 (223)	0.88 ± 0.19 (192)	0.89 ± 0.19 (181)
Changes in ABI
% with improvement	–	86.1% (192/223)	85.9% (165/192)	82.9% (150/181)
% with no change	–	0.9% (2/223)	0.0% (0/192)	1.7% (3/181)
% with decrease	–	13.0% (29/223)	14.1% (27/192)	15.5% (28/181)
Mean ± SD (N)	–	0.24 ± 0.23 (223)	0.23 ± 0.22 (192)	0.24 ± 0.23 (181)