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SPECIALITY

Coffee and tea drinking may

be associated with reduced

rates of stroke and dementia

Intake of 4-6 total cups daily was associated with lowest risks

rinking coffee or tea may
be associated with a lower
Drisk of stroke and dementia,
according to a study of healthy
individuals aged 50-74 publishing
Nov. 16 in the open-access journal
PLOS Medicine. Drinking coffee
was also associated with a lower
risk of post-stroke dementia.

Strokes are life-threatening events
which cause 10 percent of deaths
globally. Dementia is a general term
for symptoms related to decline in
brain function and is a global health
concern with a high economic and
social burden. Post-stroke dementia
is a condition where symptoms of
dementia occur after a stroke.

Yuan Zhang and colleagues from
Tianjin Medical University, Tianjin,
China studied 365,682 participants
from the UK Biobank, who were
recruited between 2006 and 2010
and followed them until 2020. At
the outset participants self-reported
their coffee and tea intake. Over associated with lower risk of post- suggested that moderate
the study period, 5,079 participants stroke dementia. consumption of coffee and tea
developed dementia and 10,053 separately or in combination were
experienced at least one stroke. The UK Biobank reflects a relatively associated with lower risk of stroke
healthy sample relative to the and dementia.”
People who drank 2-3 cups of general population which could
coffee or 3-5 cups of tea per day, restrict the ability to generalize Story Source:
or a combination of 4-6 cups of these associations. Also, relatively Materials provided by PLOS. Note:
coffee and tea had the lowest few people developed dementia or Content may be edited for style and
incidence of stroke or dementia. stroke which can make it difficult length.
Individuals who drank 2-3 cups of to extrapolate rates accurately to
coffee and 2-3 cups of tea daily larger populations. Finally, while Journal Reference:
had a 32% lower risk of stroke it’s possible that coffee and tea 1. Yuan Zhang, Hongxi Yang, Shu
(HR, 0.68, 95% CI, 0.59-0.79; P consumption might be protective Li, Wei-dong Li, Yaogang Wang.
<0.001) and a 28% lower risk of against stroke, dementia and post- Consumption of coffee and tea and
dementia (HR, 0.72, 95% CI, 0.59- stroke dementia, this causality risk of developing stroke, dementia,
0.89; P =0.002) compared with cannot be inferred from the and poststroke dementia: A cohort
those who drank neither coffee associations. study in the UK Biobank. PLOS
nor tea. Intake of coffee alone or Medicine, 2021; 18 (11): e1003830
in combination with tea was also The authors add, “Our findings DOI: 10.1371/journal.pmed.1003830

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