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Chronic kidney disease and cardiovascular disease in a general Japanese population: the Hisayama Study
Toshiharu Ninomiya1, Yutaka Kiyohara, Michiaki Kubo
1Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan. nino@intmed2.med.kyushu-u.ac.jp
Insights
Chronic kidney disease is an independent risk factor for cardiovascular disease in the general Japanese population, particularly for coronary heart disease in men and ischemic stroke in women.
Area of Science:
- Nephrology
- Cardiology
- Epidemiology
Background:
- Chronic kidney disease (CKD) is a known cardiovascular disease (CVD) risk factor in high-risk groups.
- The association between CKD and CVD in community-based populations remains unclear.
Purpose of the Study:
- To investigate the relationship between CKD and the incidence of CVD.
- To clarify the independent role of CKD as a CVD risk factor in a general population.
Main Methods:
- A 12-year prospective study of 2634 community-dwelling individuals aged 40+ without pre-existing CVD.
- Examined the incidence of coronary heart disease, ischemic stroke, and hemorrhagic stroke in relation to CKD status.
Main Results:
- CKD was associated with a higher incidence of coronary heart disease in men and ischemic stroke in women.
- Multivariate analysis confirmed CKD as an independent risk factor for coronary heart disease in men (HR 2.26) and ischemic stroke in women (HR 1.91).
- No association was found between CKD and hemorrhagic stroke.
Conclusions:
- CKD is an independent risk factor for cardiovascular disease in the general Japanese population.
- The study highlights sex-specific associations of CKD with different CVD subtypes.
Background:
Chronic kidney disease has been shown to be an independent risk factor for cardiovascular disease in high-risk populations. However, this relationship is inconclusive in community-based populations.
Methods:
To clarify this issue, we followed 2634 community-dwelling individuals without cardiovascular disease, aged 40 years or older, for 12 years and examined the relationship between chronic kidney disease and the incidence of cardiovascular disease.
Results:
During the follow-up period, 99 subjects (56 men and 43 women) experienced coronary heart disease, 137 subjects (60 men and 77 women) ischemic stroke, and 60 subjects (26 men and 34 women) hemorrhagic stroke. In men, the age-adjusted incidence of coronary heart disease was significantly higher in subjects with chronic kidney disease than in those without it (6.2 vs. 2.9 per 1000 person-years) (P < 0.05), but such a relationship was not observed with ischemic stroke. In contrast, in women, the age-adjusted incidence of ischemic stroke was significantly higher in subjects with chronic kidney disease than in those without it (3.4 vs. 2.5) (P < 0.05), while that of coronary heart disease was not. Chronic kidney disease was not found to be associated with the incidence of hemorrhagic stroke. In multivariate analysis, even after adjustments for traditional and nontraditional cardiovascular disease risk factors, chronic kidney disease was found to be an independent risk factor for the occurrence of coronary heart disease in men [hazard ratio (HR), 2.26; 95% CI, 1.06-4.79], and for the occurrence of ischemic stroke in women (HR, 1.91; 95% CI, 1.15-3.15).
Conclusion:
Our findings suggest that chronic kidney disease is an independent risk factor for the occurrence of cardiovascular disease in the general Japanese population.
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