Papers by Simeonova Radostina
Introduction: In average for the range of years 1995 - 2010 the cancer mortality in Bulgaria, for... more Introduction: In average for the range of years 1995 - 2010 the cancer mortality in Bulgaria, for men and women, is about 160 per 100000 population, 15% of the total mortality. Alters from 151 in 2000 to 173 in 2008, varies with amplitude 12% of the average.
Objective: Could this variation be due to natural causes, such as the solar activity? Sun’s magnetic field alters (but sunshine remains constant), which lead to changes in the space around the Sun, repeated in about 11 years. These changes affect the Earth, in particular its biosphere. The aim of this study was to clarify the possible link between solar activity and variation in cancer mortality in Bulgaria.
Material and methods: The analysis was based on data from Eurostat for cancer mortality in Bulgaria and data for solar activity from NASA. For processing the data MS Excel and STATISTIKA were used.
Results and discussion: The analysis shows that the variation in mortality from cancer in Bulgaria is associated with changes in solar activity. The correlation coefficient between mortality and solar activity is of high value -0.720 and high accuracy (with statistical significance level of less than 1%). In male mortality it reaches value - 0.754 with a statistical significance level less than 0.1%. A negative correlation is due to the fact that the peak in cancer mortality is lagged according to the peak of solar activity by about half period: 6 years, and the maximum of solar activity corresponds to the minimum of cancer mortality, and vice versa. This fact could be used for planning of resources for the treatment of cancer patients.
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Papers by Simeonova Radostina
Objective: Could this variation be due to natural causes, such as the solar activity? Sun’s magnetic field alters (but sunshine remains constant), which lead to changes in the space around the Sun, repeated in about 11 years. These changes affect the Earth, in particular its biosphere. The aim of this study was to clarify the possible link between solar activity and variation in cancer mortality in Bulgaria.
Material and methods: The analysis was based on data from Eurostat for cancer mortality in Bulgaria and data for solar activity from NASA. For processing the data MS Excel and STATISTIKA were used.
Results and discussion: The analysis shows that the variation in mortality from cancer in Bulgaria is associated with changes in solar activity. The correlation coefficient between mortality and solar activity is of high value -0.720 and high accuracy (with statistical significance level of less than 1%). In male mortality it reaches value - 0.754 with a statistical significance level less than 0.1%. A negative correlation is due to the fact that the peak in cancer mortality is lagged according to the peak of solar activity by about half period: 6 years, and the maximum of solar activity corresponds to the minimum of cancer mortality, and vice versa. This fact could be used for planning of resources for the treatment of cancer patients.
Objective: Could this variation be due to natural causes, such as the solar activity? Sun’s magnetic field alters (but sunshine remains constant), which lead to changes in the space around the Sun, repeated in about 11 years. These changes affect the Earth, in particular its biosphere. The aim of this study was to clarify the possible link between solar activity and variation in cancer mortality in Bulgaria.
Material and methods: The analysis was based on data from Eurostat for cancer mortality in Bulgaria and data for solar activity from NASA. For processing the data MS Excel and STATISTIKA were used.
Results and discussion: The analysis shows that the variation in mortality from cancer in Bulgaria is associated with changes in solar activity. The correlation coefficient between mortality and solar activity is of high value -0.720 and high accuracy (with statistical significance level of less than 1%). In male mortality it reaches value - 0.754 with a statistical significance level less than 0.1%. A negative correlation is due to the fact that the peak in cancer mortality is lagged according to the peak of solar activity by about half period: 6 years, and the maximum of solar activity corresponds to the minimum of cancer mortality, and vice versa. This fact could be used for planning of resources for the treatment of cancer patients.