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Effects of green tea consumption on cognitive dysfunction in an elderly population: a randomized placebo-controlled study

Overview of attention for article published in Nutrition Journal, May 2016
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About this Attention Score

  • In the top 25% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (88th percentile)

Mentioned by

1 news outlet
10 tweeters
2 Facebook pages


35 Dimensions

Readers on

95 Mendeley
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Effects of green tea consumption on cognitive dysfunction in an elderly population: a randomized placebo-controlled study
Published in
Nutrition Journal, May 2016
DOI 10.1186/s12937-016-0168-7
Pubmed ID

Kazuki Ide, Hiroshi Yamada, Norikata Takuma, Yohei Kawasaki, Shohei Harada, Junpei Nakase, Yuuichi Ukawa, Yuko M. Sagesaka


Green tea is a beverage with potential effects on cognitive dysfunction, as indicated by results of experimental studies. However, its effects in humans, especially at real-world (typical) consumption levels, are unclear. A double-blind, randomized controlled study was conducted to assess the effects of green tea consumption on cognitive dysfunction (Mini-Mental State Examination Japanese version (MMSE-J) score <28) in Japan. Participants were randomly allocated to the green tea or placebo group, and consumed either 2 g/day of green tea powder (containing 220.2 mg of catechins) or placebo powder (containing 0.0 mg of catechins), respectively, for 12 months. Cognitive function assessments were performed every 3 months using the MMSE-J and laboratory tests. Thirty-three nursing home residents with cognitive dysfunction were enrolled (four men, 29 women; mean age ± SD, 84.8 ± 9.3; mean MMSE-J score ± SD, 15.8 ± 5.4), of whom 27 completed the study. Changes of MMSE-J score after 1 year of green tea consumption were not significantly different compared with that of the placebo group (-0.61 [-2.97, 1.74], least square mean (LSM) difference [95 % CI]; P = 0.59). However, levels of malondialdehyde-modified low-density lipoprotein (U/L), a marker of oxidative stress, was significantly lower in the green tea group (-22.93 [-44.13, -1.73], LSM difference [95 % CI]; P = 0.04). Our results suggest that 12 months green tea consumption may not significantly affect cognitive function assessed by MMSE-J, but prevent an increase of oxidative stress in the elderly population. Additional long-term controlled studies are needed to clarify the effects. UMIN000011668.

Twitter Demographics

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Mendeley readers

The data shown below were compiled from readership statistics for 95 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United Kingdom 1 1%
Unknown 94 99%

Demographic breakdown

Readers by professional status Count As %
Student > Master 15 16%
Student > Bachelor 14 15%
Researcher 13 14%
Student > Ph. D. Student 8 8%
Other 6 6%
Other 12 13%
Unknown 27 28%
Readers by discipline Count As %
Medicine and Dentistry 17 18%
Biochemistry, Genetics and Molecular Biology 10 11%
Nursing and Health Professions 7 7%
Psychology 7 7%
Agricultural and Biological Sciences 5 5%
Other 14 15%
Unknown 35 37%

Attention Score in Context

This research output has an Altmetric Attention Score of 15. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 06 February 2019.
All research outputs
of 19,101,906 outputs
Outputs from Nutrition Journal
of 1,344 outputs
Outputs of similar age
of 272,912 outputs
Outputs of similar age from Nutrition Journal
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Altmetric has tracked 19,101,906 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 91st percentile: it's in the top 10% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 1,344 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 31.1. This one has gotten more attention than average, scoring higher than 67% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 272,912 tracked outputs that were published within six weeks on either side of this one in any source. This one has done well, scoring higher than 88% of its contemporaries.
We're also able to compare this research output to 1 others from the same source and published within six weeks on either side of this one. This one has scored higher than all of them