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A Study on Development of a Blood Pressure Risk Hazard Scoring System Based on Time-Series Data and Lifestyle Habits Information

Research Project

Project/Area Number 21K11995
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 61020:Human interface and interaction-related
Research InstitutionYamaguchi University

Principal Investigator

Takahashi Masakazu  山口大学, 大学院技術経営研究科, 准教授 (20621105)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords機械学習 / 弱学習 / パターン識別 / 医療情報 / 高血圧 / 高血圧症
Outline of Research at the Start

本研究は,血圧測定情報や睡眠評価情報などをもとにしてハザードリスクの知識構造化を目的としている.診察室外血圧の測定が容易になったことに加え,知能情報学の見地に基づき,探索的データ解析手法を用い,推定4300万人の高血圧症の効率的な探索アルゴリズム構築と血圧昇降圧パターン識別具現化を目的とする.研究は,ⅰ)血圧の事前知識生成,ⅱ)血圧推移の知識生成,ⅲ)夜間高血圧の予測3つの実施項目から構成される.まず,予測プロトタイプシステムを構築する.プロトタイプシステムを用い解析を行い,解析結果を評価しチューニングを行うスパイラルアップ方式で研究を進める.

Outline of Final Research Achievements

In this study, we used regular blood pressure measurements before bedtime, during sleep, and after waking up, measurement data for 7 days in which the timing of sleep and wakeup was identified, and sleep self-assessment data. A comparison of ROC curve analysis revealed that the diagnostic accuracy of morning systolic blood pressure for nocturnal hypertensive patients was significantly superior to nighttime systolic blood pressure and clinic blood pressure. Furthermore, the optimal cutoff value for waking systolic blood pressure for diagnosing nocturnal hypertension was 134.8 mmHg. This is almost in line with the home blood pressure target value of lowering morning systolic blood pressure to less than 135 mmHg, which was recommended in the hypertension management guidelines published in 2014 and was able to demonstrate the validity of the blood pressure lowering target.

Academic Significance and Societal Importance of the Research Achievements

本研究の社会的意義は,家庭血圧計を用いて正確な高血圧症の推定が可能であることである.高血圧は放置すると脳卒中などの命に関わる重大な病気を引き起こしてしまう恐れがある.さらに高血圧は,サイレントキラーと呼ばれ,自覚症状がなくても進行する病気のひとつである.そのために症状の早期発見や症状の改善が重要である.
24時間の血圧測定に基づいた研究では,昼間の血圧よりも夜間の血圧のほうが脳心血管疾患のリスクをより正確に反映することがわかった.高血圧を端緒とした疾病を予防するためにも夜間の血圧を正確に把握することが重要である.そのために日常生活に支障を及ぼすことを最小限にした測定血圧値での推定は重要である.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (5 results)

All 2023 2021

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (2 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Significant Correlates of Nocturnal Hypertension in Patients With Hypertension Who Are Treated With Antihypertensive Drugs2023

    • Author(s)
      Maruhashi Tatsuya,Kinoshita Yoshihiko,Ozono Ryoji,Nakamaru Mitsuaki,Ninomiya Masanori,Oiwa Jiro,Kawagoe Takuji,Yoshida Osamu,Matsumoto Toshiyuki,Fukunaga Yasuo,Sumii Kotaro,Ueda Hironori,Shiode Nobuo,Takahari Kosuke,Hayashi Yasuhiko,Ono Yujiro,Nakano Yukiko,Takahashi Masakazu,Kihara Yasuki,Higashi Yukihito
    • Journal Title

      American Journal of Hypertension

      Volume: 36 Issue: 6 Pages: 287-296

    • DOI

      10.1093/ajh/hpad014

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Study on Risk Assessment Approach for the Elderly Based on Sarcopenia Criteria2023

    • Author(s)
      Takahashi Masakazu、Kinoshita Yoshihiko
    • Journal Title

      Procedia Computer Science

      Volume: 225 Pages: 1524-1532

    • DOI

      10.1016/j.procs.2023.10.141

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Comparison of the time course of atopic dermatitis from birth to 19 years old among generations of patients in Japan2021

    • Author(s)
      Tanaka Akio、Morioke Satoshi、Ohya Yukihiro、Shimojo Naoki、Takahashi Masakazu、Tanaka Maiko、Takahagi Shunsuke、Kan Takanobu、Iwamoto Kazumasa、Saito Ryo、Hide Michihiro
    • Journal Title

      The Journal of Dermatology

      Volume: 48 Issue: 10 Pages: 1602-1606

    • DOI

      10.1111/1346-8138.16085

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] A Study on Risk Assessment Approach for the Elderly Based on Sarcopenia Criteria2023

    • Author(s)
      Masakazu Takahashi
    • Organizer
      27th International Conference on Knowledge Based and Intelligent information and Engineering Systems
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Identifying Unusual Human Movements Using Multi-Agent and Time-Series Outlier Detection Techniques2023

    • Author(s)
      PPG. Dinesh Asanka, Chathura Rajapakshe, Masakazu Takahashi
    • Organizer
      The 3rd International Conference on Advanced Research in Computing
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research

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Published: 2021-04-28   Modified: 2025-01-30  

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