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Med Clin (Barc). 2009 Jan 17;132(1):1-6. doi: 10.1016/j.medcli.2008.07.008. Epub 2008 Dec 3.

Association between serum uric acid, metabolic syndrome and microalbuminuria in previously untreated essential hypertensive patients.

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1
Unidad de Hipertensión, Servicio de Medicina Interna, Hospital de Sagunto, Agencia Valenciana de Salud, Sagunto, Valencia, España.

Abstract

BACKGROUND AND OBJECTIVE:

The aim of the study was to assess the association of serum uric acid levels with microalbuminuria -urinary albumin excretion (UAE)> or = 30mg/24h-.

PATIENTS AND METHOD:

Cross-sectional study in 429 (220 women) hypertensive, non diabetic, never treated patients (mean age: 47 years) with glomerular filtration rate > or =60ml/min/1.73m(2).

RESULTS:

The prevalence of microalbuminuria was 20.5%; 18% had hyperuricemia and 47% fulfilled the criteria for metabolic syndrome (MS). Baseline UAE correlated in the unvaried analysis to diastolic blood pressure, waist circumference, high-density lipoprotein cholesterol and uric acid. In multiple linear regression models, only MS (beta=0.113; p=0.03), and serum uric acid values (beta=0.04; p=0.05) were independently associated with logUAE, after adjustment for age and sex. Hyperuricemia (serum uric acid level > or =7.0mg/dl for men and > or =6.5mg/dl for women; odds ratio=2.18; 95% confidence interval, 1.21-3.92; p=0.010), and MS (odds ratio=2.16; 95% confidence interval, 1.32-3.53; p=0.002) were independently associated with a higher risk of microalbuminuria in multiple logistic regression analyses. The prevalence of microalbuminuria was 45.8% in patients with coexistent MS and hyperuricemia, as compared to 13.6% in hypertensive patients without it (p<0.001). In patients with concomitant MS and hyperuricemia the probability of being microalbuminuric was 3.7 times higher than in patients without those factors.

CONCLUSION:

Serum uric acid level is associated with microalbuminuria. Coexistence of MS and hyperuricemia in hypertensive patients increases almost 4 times the odds of being microalbuminuric.

PMID:
19174057
DOI:
10.1016/j.medcli.2008.07.008
[Indexed for MEDLINE]

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