Table 3.

Use of Arterial Testing Before Amputation by Age

TestAge, n (%)P Value
<65 y (n=3303)≥65 y (n=14 160)
Any arterial testing2151 (65.1)9794 (69.2)<0.001
 Ankle-brachial index1486 (45.0)6807 (48.1)0.001
 Duplex ultrasound950 (28.8)4476 (31.6)0.001
 Computed tomographic angiography242 (7.3)927 (6.5)0.11
 Magnetic resonance angiography148 (4.5)826 (5.8)0.002
 Invasive angiography1209 (36.6)5541 (39.1)0.007
Any arterial testing in the previous 2 y2281 (69.1)10 231 (72.3)<0.001