Association between timing of hot water bathing before bedtime and night-/sleep-time blood pressure and dipping in the elderly: a longitudinal analysis for repeated measurements in home settings. 12

• Material Type: 博士論文
• Title: Association between timing of hot water bathing before bedtime and night-/sleep-time blood pressure and dipping in the elderly: a longitudinal analysis for repeated measurements in home settings.
• Volume: 36 12
• Author/Editor: Tai, Yoshiaki; Saeki, Keigo; Yamagami, Yuki; Yoshimoto, Kiyomi; Kurumatani, Norio; Nishio, Kenji; Obayashi, Kenji
• Author Heading: Tai, Yoshiaki; Saeki, Keigo; Yamagami, Yuki; Yoshimoto, Kiyomi; Kurumatani, Norio; Nishio, Kenji; Obayashi, Kenji
• Publication, Distribution, etc.: Taylor & Francis
• Publication Date: 2019-12; 36 12
• Publication Date (W3CDTF): 2019-12
• Alternative Title: 高齢者の入浴タイミングと夜間血圧低下の関連：自宅での繰り返し実測データを用いた縦断的分析
• Periodical title: Chronobiology international
• Pages: 1714-1722
• ISSN (Periodical Title): 07420528
• Degree Grantor: 奈良県立医科大学
• Date Granted: 2020-09-30
• Date Granted (W3CDTF): 2020-09-30
• Dissertation Number: 甲第751号
• Degree Type: 博士（医学）
• Conferring No. (Dissertation): 甲第751号
• Text Language Code: eng
• Subject Heading: Bathing; nighttime blood pressure; sleep-time blood pressure; dipping; hot water; passive body heating
• Target Audience: 一般
• Note (General): type:Thesis; Hot water bathing – a Japanese traditional practice – has not been evaluated for its association with night- and sleep-time blood pressure (BP) in large population. In this longitudinal analysis, bathing parameters and ambulatory BP were repeatedly measured for 2 nights in 758 Japanese elderly individuals. Participants were divided into three groups according to tertile values of time soaked in the bathtub (Duration: tertile value, 11 and 15 min), time from bathing-end to bedtime (Time before bedtime: tertile value, 42 and 106 min), and temperature of hot water in the bathtub (Water temp: tertile value, 40.3 and 41.2 °C). Participants’ mean age was 70.9 years, and mean night- and sleep-time systolic BP (SBP) and dipping were 115.1 ± 16.1, 114.2 ± 16.2 mmHg, and 14.2 ± 8.8%, respectively. Multivariable mixed-effect linear regression models adjusted for potential confounding factors suggested that nighttime SBP was significantly lower in the intermediate Time before bedtime group by 1.7 mmHg (95% CI, 0.2–3.1) and in the short group by 1.9 mmHg (95% CI, 0.1–3.7) than that in the long group. Dipping was significantly greater in the intermediate Time before bedtime group by 1.8% (95% CI, 0.7–2.9) and in the short group by 1.8% (95% CI, 0.6–3.1) than that in the long group. These associations were consistent regarding sleep-time SBP. Conversely, Water temp and Duration did not significantly associate with any ambulatory BP parameter. Remarkably, Time before bedtime significantly prolonged with increases in tertiles of Water temp (P for trend = 0.006). In conclusion, the findings of this study revealed that Japanese hot water bathing, especially the short time from bathing-end to bedtime, was associated with lower night- and sleep-time BP and greater dipping in an elderly population.; 博士（医学）・甲第751号・令和2年9月30日; This is a post-peer-review, pre-copyedit version of an article published in Chronobiology international. The final authenticated version is available online at: https://doi.org/10.1080/07420528.2019.1675685.; identifier:Chronobiology international Vol.36 No.12 p.1714-1722 (2019 Dec); identifier:07420528; identifier:http://ginmu.naramed-u.ac.jp/dspace/handle/10564/3775; identifier:Chronobiology international, 36(12): 1714-1722
• Persistent ID (NDL): info:ndljp/pid/11674106; https://dl.ndl.go.jp/pid/11674106
• Collection: 障害者向け資料
• Collection (Materials For Handicapped People:1): テキストデータ
• Collection (particular): 国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文; https://dl.ndl.go.jp/collections/A00014
• Acquisition Basis: 博士論文（自動収集）
• Date Accepted (W3CDTF): 2021-05-23T18:24:43+09:00
• Format (IMT): application/pdf
• Access Restrictions: 国立国会図書館内限定公開
• Service for the Digitized Contents Transmission Service: 図書館・個人送信対象外
• Availability of remote photoduplication service: 可
• Related Material (URI): https://doi.org/10.1080/07420528.2019.1675685
• Periodical Title (URI): http://hdl.handle.net/10564/3775
• Data Provider (Database): 国立国会図書館 : 国立国会図書館デジタルコレクション; https://dl.ndl.go.jp

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