ISEE/ISEA 2006 Conference Abstracts Supplement: Poster Abstracts: Abstracts
Norwegian Institute of Public Health, Oslo.
It is well known that environmental conditions are related to the risk of developing cardiovascular diseases and events. However, the mechanisms behind these relations are not well understood. One mechanism could be elevation of blood pressure. In this study we assessed associations between blood pressure and environmental conditions in a cross-sectional study.
Material and Methods:
We used a population based study of about 19,000 citizens to assess associations between blood pressure and environmental conditions including season, weekday, time of day, education, alcohol intake, outdoor temperature and air pollution.
A 10°C reduction in outdoor temperature the day blood pressure was measured was related to an increase in blood pressure for both men (SBP: 1.5 mmHg (95% CI, 0.6 to 2.3); DBP: 1.3 mmHg (95% CI, 0.1 to 1.8)) and women (SBP: 2.4 mmHg (95% CI, 1.6 to 3.2); DBP: 1.8 mmHg (95% CI, 1.3 to 2.3)). Blood pressures were highest when measured on Monday mornings and reduced gradually until Friday. No convincing relation was found between indicators of air pollution exposure and blood pressure.
Several environmental conditions were related to blood pressure, and have similar associations with cardiovascular diseases or mortality. This could indicate that some of the effect these exposures have on the cardiovascular system is by increasing blood pressure.