Kenji Ebihara1, Kazumasa Yamagishi1,2,3, Mitsumasa Umesawa1,2,4, Isao Muraki2,5, Renzhe Cui5, Hironori Imano2,5, Yasuhiko Kubota2, Mina Hayama-Terada2,6, Yuji Shimizu2, Tetsuya Ohira7, Tomoko Sankai8, Takeo Okada2, Akihiko Kitamura2,9, Masahiko Kiyama2, Hiroyasu Iso1,5. 1. Department of Public Health Medicine, Faculty of Medicine, and Health Services Research and Development Center, University of Tsukuba. 2. Osaka Center for Cancer and Cardiovascular Disease Prevention. 3. Ibaraki Western Medical Center. 4. Department of Public Health, Dokkyo Medical University School of Medicine. 5. Public Health, Department of Social Medicine, Osaka University Graduate School of Medicine. 6. Yao Public Health Center, Yao City Office. 7. Department of Epidemiology, Fukushima Medical University School of Medicine. 8. Department of Public Health and Nursing, Faculty of Medicine, University of Tsukuba. 9. Research Team for Social Participation and Community Health, Tokyo Metropolitan Institute of Gerontology.
Abstract
AIM: N-terminal pro-B-type natriuretic peptide (NT-proBNP), frequently used as a biochemical marker for detecting and monitoring heart failure, is also a risk marker for development of coronary heart disease and total stroke. However, studies that explore subtypes of ischemic stroke with regard to NT-proBNP are scarce. Here, we examined NT-proBNP and its impact upon subtypes of ischemic stroke (lacunar stroke, large-artery occlusive stroke and embolic stroke) among Japanese. METHODS: We measured NT-proBNP and categorized 4,393 participants of the Circulatory Risk in Communities Study into four groups (＜55, 55-124, 125-399, and ≥ 400 pg/ml). We used a multivariable Cox proportional hazards model to examine association with risks of stroke and subtypes. RESULTS: During 4.7 years of follow-up, we identified 50 strokes, including 35 ischemic (15 lacunar, 6 largeartery occlusive, 10 embolic strokes) and 14 hemorrhagic strokes. NT-proBNP was associated with stroke risk: the multivariable hazard ratio of total strokes was 7.29 (2.82-18.9) for the highest and 2.78 (1.25-6.16) for the second highest NT-proBNP groups compared with the lowest group. The respective hazard ratios for the highest NT-proBNP group were 9.37 (3.14-28.0) for ischemic stroke and 6.81 (1.11-41.7) for lacunar stroke. Further adjustment for atrial fibrillation did not attenuate these associations. The associations were similarly observed for large-artery occlusive and embolic strokes. CONCLUSION: We found that even moderate serum levels of NT-proBNP were associated with the risk of total and ischemic strokes among Japanese whose NT-proBNP levels were relatively low compared with Westerners.
AIM: N-terminal pro-B-type natriuretic peptide (NT-proBNP), frequently used as a biochemical marker for detecting and monitoring heart failure, is also a risk marker for development of coronary heart disease and total stroke. However, studies that explore subtypes of ischemic stroke with regard to NT-proBNP are scarce. Here, we examined NT-proBNP and its impact upon subtypes of ischemic stroke (lacunar stroke, large-artery occlusive stroke and embolic stroke) among Japanese. METHODS: We measured NT-proBNP and categorized 4,393 participants of the Circulatory Risk in Communities Study into four groups (＜55, 55-124, 125-399, and ≥ 400 pg/ml). We used a multivariable Cox proportional hazards model to examine association with risks of stroke and subtypes. RESULTS: During 4.7 years of follow-up, we identified 50 strokes, including 35 ischemic (15 lacunar, 6 largeartery occlusive, 10 embolic strokes) and 14 hemorrhagic strokes. NT-proBNP was associated with stroke risk: the multivariable hazard ratio of total strokes was 7.29 (2.82-18.9) for the highest and 2.78 (1.25-6.16) for the second highest NT-proBNP groups compared with the lowest group. The respective hazard ratios for the highest NT-proBNP group were 9.37 (3.14-28.0) for ischemic stroke and 6.81 (1.11-41.7) for lacunar stroke. Further adjustment for atrial fibrillation did not attenuate these associations. The associations were similarly observed for large-artery occlusive and embolic strokes. CONCLUSION: We found that even moderate serum levels of NT-proBNP were associated with the risk of total and ischemic strokes among Japanese whose NT-proBNP levels were relatively low compared with Westerners.
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