Seasonal Variation in Home Blood Pressure Measurements and Relation to Outside Temperature in Japan
Seasonal Variation in Home Blood Pressure Measurements and Relation to Outside Temperature in Japan
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DOI：
10.3109/10641963.2010.531841
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发表时间：
2011-01-01
影响因子：
12.3
通讯作者：
Tsuji, Ichiro
中科院分区：
文献类型：
--
作者：
Hozawa, Atsushi;Kuriyama, Shinichi;Tsuji, Ichiro
以前的研究表明，外部温度会影响血压（BP）水平。然而，最近，由于供暖系统的扩展，BP水平的季节变化可能较小，特别是在使用更多热量的寒冷季节。我们使用连续测量的家庭BP数据来跟踪BP的季节变化，以分析外部温度和BP值之间的关系。在2000年9月要求测量血压的213名志愿者中，79名参与者（平均年龄72.7岁，60.0%为女性）每月至少测量一次血压，直到2003年8月（36个月）。平均测量次数为19.0次/月。日本气象厅提供了有关室外温度的信息。我们使用一般的线性模型来分析外部温度与BP值之间的关系。在最热的月份，血压水平最低。然而，最高的BP水平不是在最冷的月份观察到的，而是在3月。温度和BP值之间的明显负相关仅在外部温度高于10摄氏度的时期才明显。当外部温度为≤ 10 ℃时，外部温度增加1 ℃对应于收缩压（SBP）和舒张压（DBP）降低0.40和0.28 mmHg，而当外部温度< 10 ℃时，对应值为0.06和0.01 mmHg。总之，只有在温暖的季节，观察到外部温度和BP之间的负相关。
Previous studies have suggested that outside temperature affects blood pressure (BP) levels. However, recently, due to a spreading heating system, the seasonal variation in BP levels might be smaller, especially in colder seasons when more heat is used. We used continuous measurements of home BP data to track seasonal variations of BP to analyze the relation between outside temperature and BP values. Among 213 volunteers who were asked to measure BP in September 2000, 79 participants (mean age 72.7 years, 60.0% women) measured BP at least once per month until August 2003 (36 months). The mean number of measurements was 19.0 times/month. Information on outside temperature was provided by the Japan Meteorological Agency. We used general linear models to analyze the relation between outside temperature and BP values. Blood pressure levels were lowest in the warmest months. However, the highest BP levels were not observed in the coldest month, but rather in March. A clear inverse association between temperature and BP values was evident only in periods when outside temperatures were above 10 degrees C. When the outside temperature was = 10 degrees C, 1 degrees C increment of outside temperature correspond to 0.40 and 0.28 mmHg decrease of systolic blood pressure (SBP) and diastolic blood pressure (DBP), whereas the corresponding values were 0.06 and 0.01 mmHg when the outside temperature was < 10 degrees C. In conclusion, inverse association between outside temperature and BP was observed only in warmer seasons.