Proteinuria and risk of stroke in patients with hypertension: The Kailuan cohort study
第一作者:Anxin Wang,Liye Dai
2018-04-08
发表杂志:The Journal of Clinical Hypertension
发表类型: Original Contributions
影响因子(IF): 2.63
PMID: 29624861 Pubmed原文链接 全文下载
Studies demonstrated that a decreased level of kidney function is an independent risk factor for all-cause mortality as well as adverse cardiovascular disease outcomes including myocardial infarction, stroke, and progression of heart failure. As an important marker of chronic kidney disease (CKD), proteinuria was proved to be associated with incident stroke during the last few decades. Data suggested that baseline proteinuria confers a 50%-92% greater risk of future stroke. Previous study demonstrated that the prevalence of proteinuria was higher in the hypertensive group than in the normotensive group (hypertensive group, 33.9%; normotensive, 10%). Furthermore, data from the China National Stroke Screening Survey (CNSSS) showed that hypertension ranked in first place among factors contributing to stroke in China. The association between proteinuria and stroke, in particular, should be noted in the hypertensive population who are at high risk for the development of stroke. More important, proteinuria often changes dynamically, showing regression or progression. However, an inherent limitation of previous studies is the reliance on a single time point by which to assess kidney damage and events using baseline proteinuria. The value of multiple dipstick measurements for changes in proteinuria and its relation with stroke outcomes has rarely been investigated. Therefore, we conducted this study to assess the relationship between proteinuria change and stroke incidence in participants with hypertension.
This study examined whether proteinuria changes across 2-year assessments were associated with incident stroke in individuals with hypertension.We used visit data from 24 300 participants with hypertension of the Kailuan study who were stroke free at baseline. Based on the baseline and 2-year dipstick screening results, participants were classified as having no, remittent, incident, or persistent proteinuria.
No interaction was found between changes of proteinuria and diabetes mellitus in the hypertensive population. Changes in proteinuria exposure, particularly persistent proteinuria, play a role in reflecting the risk of stroke in patients with hypertension.
The relationship between proteinuria and stroke was analyzed using Cox proportional-hazards models after adjusting for potential variables. During a median of 6.89-year follow-up, we identified 1197 people with stroke. Compared to those with no proteinuria, stroke risk was significantly increased in participants with incident (hazard ratio [HR] 1.41, 95% CI, 1.05-1.77) and persistent proteinuria (HR 1.49, 95% CI, 1.25-1.89) after adjustment for other factors, which was consistent in ischemic stroke and intracerebral hemorrhage.