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Serum Urate Levels and the Risk of Hip Fractures: Data from the Cardiovascular Health Study

Identifieur interne : 001380 ( Main/Exploration ); précédent : 001379; suivant : 001381

Serum Urate Levels and the Risk of Hip Fractures: Data from the Cardiovascular Health Study

Auteurs : Tapan Mehta [États-Unis] ; Petra Bůžková [États-Unis] ; Mark J. Sarnak [États-Unis] ; Michel Chonchol [États-Unis] ; Jane A. Cauley [États-Unis] ; Erin Wallace [États-Unis] ; Howard A. Fink [États-Unis] ; John Robbins ; Diana Jalal [États-Unis]

Source :

RBID : PMC:4312534

Descripteurs français

English descriptors

Abstract

Purpose

Uric acid inhibits vitamin D activation experimentally and higher serum urate levels are associated with higher parathyroid hormone levels in humans suggesting a link between uric acid and bone health. We hypothesized that hyperuricemia may increase the risk of fractures in older adults.

Methods

1963 men and 2729 women ≥ 65 years of age who participated in the Cardiovascular Health Study and had baseline serum urate levels were included in the study. The primary outcome was incident hip fracture, assessed prospectively through June, 2008 by inpatient and outpatient records. The analysis was stratified by sex apriori.

Results

There was a U- shaped relationship between serum urate levels and hip fractures in men. Men in the lowest and the highest urate quartiles (<4.88 and ≥6.88 mg/dL respectively) had a significantly higher rate of fractures in unadjusted analysis. However, upon multivariate adjustment, only the HR for hip fracture in highest quartile versus the reference remained significant (HR 1.9; 95% C.I. 1.1, 3.1; p value 0.02). High serum urate levels were not associated with hip fractures in women.

Conclusion

In this large prospective cohort of community-dwelling older adults, increased serum urate levels were associated with an increased risk of hip fractures in men. Further studies are needed to confirm these findings and to understand the mechanisms that underlie them.


Url:
DOI: 10.1016/j.metabol.2014.11.006
PubMed: 25491429
PubMed Central: 4312534


Affiliations:


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<term>Aged, 80 and over</term>
<term>Body Mass Index</term>
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<term>Estrogen Replacement Therapy</term>
<term>Female</term>
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<title>Purpose</title>
<p id="P1">Uric acid inhibits vitamin D activation experimentally and higher serum urate levels are associated with higher parathyroid hormone levels in humans suggesting a link between uric acid and bone health. We hypothesized that hyperuricemia may increase the risk of fractures in older adults.</p>
</sec>
<sec id="S2">
<title>Methods</title>
<p id="P2">1963 men and 2729 women ≥ 65 years of age who participated in the Cardiovascular Health Study and had baseline serum urate levels were included in the study. The primary outcome was incident hip fracture, assessed prospectively through June, 2008 by inpatient and outpatient records. The analysis was stratified by sex
<italic>apriori</italic>
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<p id="P3">There was a U- shaped relationship between serum urate levels and hip fractures in men. Men in the lowest and the highest urate quartiles (<4.88 and ≥6.88 mg/dL respectively) had a significantly higher rate of fractures in unadjusted analysis. However, upon multivariate adjustment, only the HR for hip fracture in highest quartile versus the reference remained significant (HR 1.9; 95% C.I. 1.1, 3.1; p value 0.02). High serum urate levels were not associated with hip fractures in women.</p>
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<sec id="S4">
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<p id="P4">In this large prospective cohort of community-dwelling older adults, increased serum urate levels were associated with an increased risk of hip fractures in men. Further studies are needed to confirm these findings and to understand the mechanisms that underlie them.</p>
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