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Kidney Blood Press Res. 2009;32(1):37-44. doi: 10.1159/000203348. Epub 2009 Feb 20.

Serum phosphate and left ventricular hypertrophy in young adults: the coronary artery risk development in young adults study.

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1
United States Renal Data System, Minneapolis, Minn 55404, USA. rfoley@usrds.org

Abstract

BACKGROUND/AIMS:

A relationship with vascular dysfunction in chronic kidney disease suggests a possible association of phosphate level with left ventricular hypertrophy development in people with normal kidney function. We aimed to determine whether such an association exists in community-dwelling young adults.

METHODS:

This is a cohort study of participants in the ongoing, community-based, prospective Coronary Artery Risk Development in Young Adults study (n = 4,055). Phosphate levels were measured at year 0, and left ventricular hypertrophy assessed by echocardiography at year 5.

RESULTS:

The mean age was 25.0 years. Mean values were: estimated glomerular filtration rate 118.5 ml/min/1.73 m(2); phosphate 3.7 mg/dl; left ventricular mass indexed to body surface area 80.5 g/m(2), and indexed to height(2.7) 35.2 g/m(2.7). Left ventricular hypertrophy was present in 4.5% of the population. As a continuous variable, the phosphate level was associated with left ventricular hypertrophy (odds ratio per standard deviation 1.27; 95% confidence interval 1.09-1.47; p = 0.0020). This association persisted after covariate adjustment (odds ratio per standard deviation 1.30; 95% confidence interval 1.10-1.54; p = 0.0018), and was most pronounced for fifth quintile phosphate levels (>4.0 mg/dl).

CONCLUSION:

Phosphate level may be a risk factor for left ventricular hypertrophy in community-dwelling young adults. As phosphate levels may be modifiable, the causality of this association can be addressed with controlled trials.

PMID:
19229116
DOI:
10.1159/000203348
[Indexed for MEDLINE]
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