ORIGINAL ARTICLE: PDF OnlyCaffeine-containing beverages and the prevalence of hypertensionBirkett, Nicholas J.; Logan, Alexander G.*Author Information From the Departments of Anaesthesia, and Preventive Medicine Biostatistics, and the *Department of Medicine, University of Toronto, Toronto, Ontario, Canada. Journal of Hypertension: December 1988 - Volume 6 - Issue 4 - p S620-622 Buy Abstract Caffeine can produce a mild hypertensive effect for a few hours after use. Some epidemiological data relate chronic coffee intake to an increased risk of cardiovascular disease. We explored the possibility that a regular intake of caffeine-containing beverages (tea, coffee, cola) might produce a chronic increase in blood pressure and increase the likelihood of developing sustained hypertension. A random population survey of 2436 adults was made, with standardized blood pressure readings and a food-frequency questionnaire to determine the regular intake of various nutrients. We found evidence that caffeine intake was positively related to an increased diastolic blood pressure but the effect was small (<1 mmHg at usual caffeine intake). There was no evidence that a regular caffeine intake increases the risk of being classified as hypertensive. © Lippincott-Raven Publishers.