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The study lasted from January 1998 to December 2013 in Sweden. During this period, 3 million meteorological data points were generated by 132 meteorological stations, including information on daily temperatures, wind, atmospheric pressure, humidity and precipitation. Meteorological data was available for 274,029 patients, of whom 92,044 were diagnosed with a heart attack. The average age of the patients was 72 years old.
During the summer, temperatures in Sweden range between 59 and 77 degrees and sometimes peak in the mid-80s, according to Sweden.swe. "The winters here are long, cold and dry, with[freezing] the temperatures lasted several months, "said the website. In January, the average temperature is below 32 degrees Fahrenheit.
Fortunately for North Texans, winters are not as cold here. In January, the generally coldest month in the region, the normal maximum temperature is 56.4 degrees with an average low of 35.5.
The weather alone can not be blamed on the heart attacks of the cold season. The study indicates that a number of "season-dependent behavioral patterns," including reduced physical activity in winter, dietary changes and depression, may also contribute to increased risk of heart attack.
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