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Two-year changes in proteinuria and risk for myocardial infarction in patients with hypertension: a prospective
Anxin Wang1, Xiaoxue Liu, Zhaoping Su
1aDepartment of Neurology, Beijing Tiantan Hospital, Capital Medical University bChina National Clinical Research Center for Neurological Diseases cCenter of Stroke, Beijing Institute for Brain Disorders dBeijing Key Laboratory of Translational Medicine for Cerebrovascular Disease eDepartment of Epidemiology and Health Statistics, School of Public Health, Capital Medical University, Beijing fDepartment of Cardiology, Tangshan People's Hospital, North China University of Science and Technology, Tangshan gDepartment of Epidemiology and Health Statistics, Academy of Public Health and Management, Weifang Medical University, Weifang hDepartment of Cardiology, Kailuan Hospital, North China University of Science and Technology, Tangshan, China.
Objective:
To assess whether changes in proteinuria are associated with the incidence of myocardial infarction (MI) in patients with hypertension.
Methods:
The Kailuan study was a prospective longitudinal cohort study on cardiovascular risk factors and events. Hazard ratios with 95% confidence intervals (CIs) were calculated using Cox regression models.
Results:
A total of 24 926 hypertensive patients (mean age: 55.2 ± 10.9 years) without previous MI were included. After a mean follow-up of 6.8 years, 382 (1.5%) individuals developed MI. Participants with proteinuria at baseline had a 60% higher risk for developing MI as compared with participants without proteinuria at baseline (hazard ratio: 1.60, 95% CI: 1.12-2.29) after adjusting for dyslipidemia, diabetes mellitus and other cardiovascular risk factors. Compared with participants without proteinuria, individuals with incident proteinuria or persistent proteinuria during the follow-up had 54 and 141% higher risks for developing MI, respectively (hazard ratio: 1.54, 95% CI: 1.14-2.09 and hazard ratio: 2.41, 95% CI: 1.59-3.66; all P < 0.05).
Conclusion:
Proteinuria is associated with an increased incidence of MI, but the association is likely to be underestimated if baseline measurements of proteinuria are used. Measures of changes in proteinuria, particular persistent proteinuria, are more likely to reflect the lifetime risk for MI.
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