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PLoS One. 2014 Dec 1;9(12):e114259. doi: 10.1371/journal.pone.0114259. eCollection 2014.

Hyperuricemia and risk of incident hypertension: a systematic review and meta-analysis of observational studies.

Author information

1
Department of Evidence-Based Medicine and Clinical Epidemiology, West China Hospital, Sichuan University, Chengdu, China.
2
Second Affiliated Hospital of Chengdu University of TCM, Chengdu University of TCM, Chengdu, China.
3
Department of Cardiology, Mianyang People's Hospital, Mianyang City, China.
4
Department of Cardiology, West China Hospital, Sichuan University, Chengdu, China.

Abstract

BACKGROUND:

Observational studies of the relationship between hyperuricemia and the incidence of hypertension are controversial. We conducted a systematic review and meta-analysis to assess the association and consistency between uric acid levels and the risk of hypertension development.

METHODS:

We searched MEDLINE, EMBASE, CBM (Chinese Biomedicine Database) through September 2013 and reference lists of retrieved studies to identify cohort studies and nested case-control studies with uric acid levels as exposure and incident hypertension as outcome variables. Two reviewers independently extracted data and assessed study quality using Newcastle-Ottawa Scale. Extracted information included study design, population, definition of hyperuricemia and hypertension, number of incident hypertension, effect sizes, and adjusted confounders. Pooled relative risks (RRs) and corresponding 95% confidence intervals (CIs) for the association between hyperuricemia and risk of hypertension were calculated using a random-effects model.

RESULTS:

We included 25 studies with 97,824 participants assessing the association between uric acid and incident hypertension in our meta-analysis. The quality of included studies is moderate to high. Random-effects meta-analysis showed that hyperuricemia was associated with a higher risk of incident hypertension, regardless of whether the effect size was adjusted or not, whether the data were categorical or continuous as 1 SD/1 mg/dl increase in uric acid level (unadjusted: RR = 1.73, 95% CI 1.46∼2.06 for categorical data, RR = 1.22, 95% CI 1.03∼1.45 for a 1 SD increase; adjusted: RR = 1.48, 95% CI 1.33∼1.65 for categorical data, RR = 1.15, 95% CI 1.06∼1.26 for a 1 mg/dl increase), and the risk is consistent in subgroup analyses and have a dose-response relationship.

CONCLUSIONS:

Hyperuricemia may modestly increase the risk of hypertension incidence, consistent with a dose-response relationship.

PMID:
25437867
PMCID:
PMC4250178
DOI:
10.1371/journal.pone.0114259
[Indexed for MEDLINE]
Free PMC Article

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