Eine amerikanische wissenschaftliche Untersuchung zeigt, daß das Risiko durch Kaffeegenuß einen Bluthochdruck zu entwickeln oder zu verschlechtern über die Jahre gering ist.
Coffee lntake and Risk of Hypertension :
The JMichael]. Klag, MD, MPH et al.; The Johns Hopkins Precursors Study .
Arch Intern Med.2002;162:657-662
Background: Whether the increase in blood pressure with coffee drinking seen in clinical trials persists over time and translates an increased incidence of hypertension is not known.
Results: Consumption of I cup of coffee a day raised systolic blood pressure by 0.19 mmHg (95% confidence interval, 0.O2-0.35) and diastolic pressure by 0.27 mm Hg (95% confidence interval, O.15-0.39) after adjustment for parental incidence of hypertension and time-dependent body mass index, cigarette smoking, alcohol drinking, and physical activity in analyses using generalized estimating equations. Compared with nondrinkers at baseline, coffee drinkers bad a greater incidence of hypertension during fo1low-Up (18.8% vs 28.3%; P=.O3). Relative risk (95%confidence interval) of hypertension associatedwith drinking 5 or more cups a day was 1.35 (O.87-2.08) für baseline intake and 1.60 (1.06-2.40) for intake over follow-up.After adjustment für the variables listed ave, however , these associations were not statistically significant.
Concluslon: Over many years of follow-up, coffee drinking is associated with small increases in blood pressure, but appears to play a small role in the development of hypertension.