Table 4.

Use of Arterial Testing Before Amputation by Peripheral Arterial Disease Status*

TestDisease Status, n (%)P Value
No Peripheral Arterial Disease (n=8016)Peripheral Arterial Disease (n=9447)
Any arterial testing4980 (62.1)6965 (73.7)<0.001
 Ankle-brachial index3304 (41.2)4989 (52.8)<0.001
 Duplex ultrasound2139 (26.7)3287 (34.8)<0.001
 Computed tomographic angiography525 (6.5)644 (6.8)0.48
 Magnetic resonance angiography381 (4.8)593 (6.3)<0.001
 Invasive angiography2775 (34.6)3975 (42.1)<0.001
Any arterial testing in the previous 2 y5008 (62.5)7504 (79.4)<0.001
  • * Peripheral arterial disease status defined by International Classification of Diseases, Ninth Revision, Clinical Modification code or revascularization 12 to 24 mo before amputation.