Key result
Consumption of unfiltered boiled coffee significantly increased mean ambulant systolic blood pressure by 3.1 mm Hg compared to boiled-and-filtered coffee (p=0.006).
Why the study?
Does unfiltered boiled coffee or elimination of coffee affect blood pressure compared to filtered coffee in adults?
Population
64 adults (31 women, 33 men)
Comparison
Unfiltered boiled coffee or no coffee for 79 days vs Boiled-and-filtered coffee for 79 days
Design
RCT, randomly divided into three groups
Follow-up
79 days
Authors
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Recommend filtered over unfiltered boiled coffee to limit systolic BP rise; confirms causal pressor effect in RCT.
RCT (n=64)
Randomly divided
Does unfiltered boiled coffee or elimination of coffee affect blood pressure compared to filtered coffee in adults?
Mean Difference: 3.1
p-value: p=0.006
Consumption of unfiltered boiled coffee causes a slight but significant rise in systolic blood pressure compared to filtered coffee, whereas eliminating filtered coffee has no substantial long-term effect.
Dusseldorp et al. (1991) reported an RCT. Unfiltered boiled coffee vs. Boiled-and-filtered coffee or no coffee was evaluated on Mean ambulant systolic blood pressure (MD 3.1 mm Hg, p=0.006). Consumption of unfiltered boiled coffee significantly increased mean ambulant systolic blood pressure by 3.1 mm Hg compared to boiled-and-filtered coffee (p=0.006).
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