Abstract
To investigate the link between low air temperature and ambulance transports in Japan. Data on climate parameters i.e. air temperature, humidity and daylight hours in Sakata area, Yamagata prefecture, Japan, which is northern part (Tohoku) in Japan, was obtained from Japan Meteorological Agency. Monthly data on ambulance transports due to acute disease from 2005 to 2011 was also directly obtained from Sakata area official website, Japan. The relations between air temperature and ambulance transports were evaluated by ecological study. Ambulance transports per day were 10.1 ± 1.0 and mean air temperature was 13.0 ± 8.4 (°C). Ambulance transports per day were weakly and negatively correlated with mean air temperature, mean of the highest air temperature, mean of the lowest air temperature, the highest air temperature and daylight hours. It was also weakly and positively correlated with mean humidity. However, the relation between ambulance transports and mean air temperature was well estimated by quadratic curve (r = 0.633, p
Highlights
Global warming and its related health problems are well known and have become public health challenge in the world
We explored the relationship between ambulance transports due to acute disease and climate parameters i.e. air temperature, humidity and daylight hours in Sakata area, Yamagata, prefecture, Japan, which located in northern part (Tohoku) of Japan by ecological study
We estimated the relation between ambulance transports per day and climate parameters by quadratic curve (Table 3, Figure 1)
Summary
Global warming and its related health problems are well known and have become public health challenge in the world. Higher air temperature was closely associated with higher ambulance transports due to heat stroke in Japan by ecological study [1]. Higher air temperature was closely associated with higher ambulance transports due to heat stroke in Japan [2]. Several authors have reported either a U-shaped, V-shaped or J-shaped relationship to describe the effect of air temperature on mortality [5,6,7,8]. We explored the relationship between ambulance transports due to acute disease and climate parameters i.e. air temperature, humidity and daylight hours in Sakata area, Yamagata, prefecture, Japan, which located in northern part (Tohoku) of Japan by ecological study
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