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Title: The association between urinary albumin excretion and ankle-brachial index in elderly Taiwanese patients with type 2 diabetes mellitus.
Author: Tseng CH, Chong CK, Tseng CP, Tai TY.
Journal: Age Ageing; 2008 Jan; 37(1):77-82. PubMed ID: 18006511.
Abstract:
OBJECTIVE: this study examined the association between urinary albumin/creatinine ratio (ACR) and ankle-brachial index (ABI), or peripheral arterial disease (PAD), in elderly patients with type 2 diabetes mellitus (T2DM). METHODS: a total of 290 (108 men, 182 women) T2DM, aged > or =65 (71.6 +/- 4.9) years were recruited. PAD was diagnosed by ABI<0.9, and ACR was divided into normoalbuminuria (<30.0 microg/mg), microalbuminuria (30.0-299.9 microg/mg), and macroalbuminuria (> or = 300.0 microg/mg). RESULTS: patients with PAD (n = 45) had higher ln(ACR) than patients without: 4.48 +/- 1.48 versus 3.73 +/- 1.39 (P<0.01). For normoalbuminuria (n = 112), microalbuminuria (n = 152), and macroalbuminuria (n = 26), respective PAD prevalence was 8.0, 17.1 and 38.5% (P<0.001). The proportion of normoalbuminuria, microalbuminuria and macroalbuminuria in patients with PAD was 20.0, 57.8 and 22.2%, respectively; and 42.0, 51.4 and 6.5%, respectively, in patients without (P<0.001). Ln(ACR) was inversely correlated with ABI in all patients (gamma = -0.198, P<0.01) and in separate sexes (gamma = -0.211 for men and gamma = -0.181 for women). The multivariate-adjusted odds ratios for PAD for every 1 unit increment of ln(ACR) was 1.66 (1.17-2.34); and for microalbuminuria versus normoalbuminuria and macroalbuminuria versus normoalbuminuria were 2.54 (1.05-6.17) and 5.86 (1.76-19.52), respectively. CONCLUSIONS: urinary ACR is not only associated with PAD, it is also significantly correlated with ABI in an inverse pattern in elderly Taiwanese with T2DM.

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