Matsumaru Naoki, Okada Hideshi, Suzuki Kodai, Nachi Sho, Yoshida Takahiro, Tsukamoto Katsura, Ogura Shinji
Global Regulatory Science, Gifu Pharmaceutical University, Gifu, Japan.
Department of Emergency and Disaster Medicine, Gifu University, Gifu, Japan,
Cerebrovasc Dis Extra. 2020;10(1):1-10. doi: 10.1159/000505122. Epub 2020 Feb 5.
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.
We investigated whether meteorological conditions are significant risk factors for stroke, focusing on the fluctuation of weather elements that triggers the onset of stroke.
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.
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 < 0.001). Temperature (odds ratio: 0.91; p < 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.
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.
已发现中风发病率存在季节性变化；血压作为其中一个风险因素，受湿度和温度影响。中风发病率与气象参数之间的关系仍存在争议。
我们调查气象条件是否为中风的重要风险因素，重点关注引发中风发作的天气要素波动。
我们收集了岐阜县急救人员记录的救护车运输数据。纳入运输原因是中风的病例，排除创伤病例。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相结合。我们的目标时间段为2012年1月至2016年12月。
在5年目标期内，有5501例因中风进行救护车运输的情况。确认了季节性趋势，因为中风的救护车运输在低温时更频繁发生（p<0.001）。温度（优势比：0.91；p<0.001）和湿度变化（优势比：1.50；p = 0.016）被确定为中风导致救护车运输的风险因素。温度升高导致的风险低于降低（优势比：0.58；p = 0.09），尽管无统计学显著差异。
研究了气象对中风导致救护车运输频率的影响。较低温度和剧烈湿度变化被确定为中风导致救护车运输的风险因素，温度降低也与之相关。我们推测了在医学经济学中利用气象数据优化有限医疗资源分配的可能性。
