Association between Serum Phosphate Levels and Stroke Risk in Patients Undergoing Hemodialysis: The Q-Cohort Study

Shunsuke Yamada, Kazuhiko Tsuruya, Masatomo Taniguchi, Masanori Tokumoto, Kiichiro Fujisaki, Hideki Hirakata, Satoru Fujimi, Takanari Kitazono

研究成果: Contribution to journalArticle査読

29 被引用数 (Scopus)

抄録

Background and Purpose - The contribution of serum phosphate levels to stroke risk in dialysis patients remains unclear. The present study aimed to elucidate the respective association between serum phosphate levels and the risk of brain hemorrhage or infarction in patients undergoing hemodialysis. Methods - A total of 3437 patients undergoing hemodialysis were followed up for a median of 3.9 years. The primary outcome was the occurrence of brain hemorrhage or infarction. Patients were divided into 4 groups based on their baseline serum phosphate levels (Q1-Q4). Stroke risk was estimated using a Cox proportional hazards model. Results - During the follow-up period, 75 patients experienced brain hemorrhage and 139 experienced brain infarction. The risk of brain hemorrhage was significantly higher in the highest (Q4) compared with the lowest quartile (Q1) as the reference value (multivariate-adjusted hazard ratio [95% confidence intervals]: Q1, 1.00; Q2, 1.76 [0.79-4.18]; Q3, 1.99 [0.92-4.67]; and Q4, 2.74 [1.27-6.47]; P=0.077 for trend; hazard ratio for every 1 mmol/L increase in serum phosphate level, 2.07 [1.10-3.81]; P=0.025). In contrast, the risk of brain infarction was significantly higher in Q1 (P=0.045) compared with Q3 as the reference value (Q1, 1.65 [1.01-2.73]; Q2, 1.35 [0.82-2.25]; Q3, 1.00; and Q4, 1.30 [0.77-2.20]). Conclusions - Higher serum phosphate levels were associated with an increased risk of brain hemorrhage, whereas low levels were associated with an increased risk of brain infarction in hemodialysis patients. These results suggest the importance of managing serum phosphate levels within an appropriate range in hemodialysis patients. Clinical Trial Registration - URL: http://www.umin.ac.jp/. Unique identifier: UMIN000000556.

本文言語英語
ページ(範囲)2189-2196
ページ数8
ジャーナルStroke
47
9
DOI
出版ステータス出版済み - 9 1 2016

All Science Journal Classification (ASJC) codes

  • 臨床神経学
  • 循環器および心血管医学
  • 高度および特殊看護

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