High prevalence of undiagnosed patients with peripheral arterial disease in patients hospitalised for non-vascular disorders

Background: Several studies highlight the underestimation of peripheral arterial disease (PAD) rates in general population, leading to a lack of opportunity to detect subjects at a high risk for cardiovascular events. We sought to investigate (i) the prevalence of unrecognised PAD in patients hospitalised for non-vascular diseases and (ii) the intensity of preventive drug therapies in this population. Design and methods: This study was of the cross-sectional design in a tertiary care hospital, which included 291 randomly selected patients of >= 40 years of age. Patients were assessed for medical history, pulse palpation and ankle-brachial index (ABI). The Edinburgh Claudication Questionnaire (ECQ) was administered. PAD was defined either by an ABI <= 0.9 or >= 1.4 or in case of limb revascularisation history. Results: Overall PAD prevalence was 29%; 21 patients (7.2%) with a history of PAD, while 65 (22.3%) had an unknown PAD. Among patients with unknown PAD, a typical intermittent claudication was unusual (3%). In patients without cardiovascular disease (CVD), four factors were associated with unrecognised PAD: absence of posterior tibial pulse (OR 4.49, 95% CI 1.89-10.51; p < 0.001), male sex (OR 2.32, 95% CI 1.03-5.25; p = 0.04), age > 70 years (OR 2.44, 95% CI 1.07-5.58; p = 0.04), CVD risk factors >= 2 (OR 2.63, 95% CI 1.20-5.76; p = 0.02). Antiplatelet therapy and statins were each prescribed in 35.5% of the unrecognised PAD patients with ABI <= 0.9 and 25.8% of those with ABI >= 1.4. Conclusions: In a tertiary care hospital, the prevalence of unrecognised PAD among patients hospitalised for non-PAD-related causes is high and the preventive CVD therapy rates are low. Hospitalisation is a good opportunity to detect PAD.