Background: Stroke has been found to have a seasonally varying incidence; blood pressure, one of its risk factors, is influenced by humidity and temperature. The relationship between the incidence of stroke and meteorological parameters remains controversial. Objective: We investigated whether meteorological conditions are significant risk factors for stroke, focusing on the fluctuation of weather elements that triggers the onset of stroke. Methods: We collected ambulance transportation data recorded by emergency personnel from Gifu Prefecture. We included cases where the cause of the transportation was stroke and excluded cases of trauma. We combined these data with meteorological data as well as data on average temperature, average air pressure, and humidity provided publicly by the Japan Meteorological Agency. Our target period was from January 2012 to December 2016. Results: In the 5-year target period, there were 5,501 occurrences of ambulance transportation due to stroke. A seasonal tendency was confirmed, since ambulance transportation for stroke occurred more frequently at low temperatures (p #x3c; 0.001). Temperature (odds ratio: 0.91; p #x3c; 0.001) and humidity change (odds ratio: 1.50; p = 0.016) were identified as risk factors for ambulance transportation due to stroke. An increase in temperature incurs a lower risk than a decrease (odds ratio: 0.58; p = 0.09), although there is no statistically significant difference. Conclusions: Meteorological effects on the frequency of ambulance transportation due to stroke were studied. A lower temperature and radical humidity change were identified as risk factors for ambulance transportation due to stroke, and a decrease in temperature was also associated. We speculate on the possibilities of using meteorological data to optimize the assignment of limited medical resources in medical economics.
Cerebrovasc Dis Extra 2020;10:1–10

中文翻译：

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天气波动可能会对社会中风的发生产生影响：一项基于人群的队列研究。

背景：中风的发病率随季节变化而变化。血压是其危险因素之一，受湿度和温度的影响。中风的发生率与气象参数之间的关系仍然存在争议。目的：我们调查了气象条件是否是中风的重要危险因素，重点是引发中风的天气因素的波动。方法：我们收集了岐阜县急救人员记录的救护车运输数据。我们纳入了运输原因为中风的病例，并排除了外伤的病例。我们将这些数据与气象数据以及日本气象厅公开提供的平均温度，平均气压和湿度数据结合在一起。我们的目标时间是从2012年1月到2016年12月。结果：在5年的目标时间里，有5 501起因中风而导致的救护车运输事件。由于在低温下中风的救护车运输更加频繁，因此确认了季节性趋势（p＃x3c； 0.001）。温度（比值：0.91; p＃x3c; 0.001）和湿度变化（比值：1.50;p = 0.016）被确定为中风导致的救护车运输的危险因素。尽管没有统计学上的显着差异，但温度升高引起的风险要低于温度降低引起的风险（优势比：0.58；p = 0.09）。结论：研究了气象对中风引起的救护车运输频率的影响。较低的温度和根本的湿度变化被确定为由于中风而导致救护车运输的危险因素，并且温度的降低也与此相关。我们推测在医学经济学中使用气象数据来优化有限医学资源分配的可能性。
Cerebrovasc Dis Extra 2020; 10：1–10