Evidence map›Paper›PMID 35934956›Full record

ArticleCNS neuroscience & therapeutics2022

Impact of constipation on progression of Alzheimer's disease: A retrospective study.

Taizen Nakase, Yasuko Tatewaki, Benjamin Thyreau, Tatsushi Mutoh, Naoki Tomita, Shuzo Yamamoto, Yumi Takano, Michiho Muranaka, Yasuyuki Taki

Abstract read
In one paragraph

Article in CNS neuroscience & therapeutics, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

25 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  7. Review
  8. Article
  9. Gut: The gate and key to brain.Chinese medical journal · 2025
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  13. Early detection of Alzheimer's disease using the MEMORIES mnemonic.Chronic diseases and translational medicine · 2025
    Review
  14. Article
  15. Article
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  18. Article
  19. Article
  20. Enteric Glial Cells at the Crossroads Between Intestinal Inflammation and Amyloids Diseases.Cellular and molecular gastroenterology and hepatology · 2024
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors.

Taizen NakaseSmart Aging Research Center, Tohoku University, Sendai, Japan.ORCID 0000-0002-1796-5859
Yasuko TatewakiDepartment of Aging Research and Geriatric Medicine, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan.
Benjamin ThyreauSmart Aging Research Center, Tohoku University, Sendai, Japan.
Tatsushi MutohDepartment of Aging Research and Geriatric Medicine, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan.
Naoki TomitaDepartment of Aging Research and Geriatric Medicine, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan.
Shuzo YamamotoDepartment of Aging Research and Geriatric Medicine, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan.
Yumi TakanoDepartment of Aging Research and Geriatric Medicine, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan.
Michiho MuranakaDepartment of Aging Research and Geriatric Medicine, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan.
Yasuyuki TakiSmart Aging Research Center, Tohoku University, Sendai, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeIn terms of the gut-brain axis, constipation has been considered to be an important factor of neurodegenerative diseases, although the exact mechanism is still controversial. Herein, we aimed to investigate the contribution of constipation to the progression of dementia in a retrospective study.

methodsPatients of Alzheimer's disease(AD) and amnestic mild cognitive impairment were consecutively screened between January 2015 and December 2020, and those of whom brain MRI and neuropsychological tests were performed twice were enrolled in this study. Participants were classified into with constipation (Cons[+], n = 20) and without constipation (Cons[-], n = 64) groups. Laboratory data at the first visit were used. Regression analysis was performed in MMSE, ADAS-Cog, and the volumes of hippocampus on MRI-MPRAGE images and deep white matter lesions (DWMLs) on MRI-FLAIR images obtained at two different time points.

resultsThe main finding was that the Cons[+] group showed 2.7 times faster decline in cognitive impairment compared with the Cons[-] group, that is, the liner coefficients of ADAS-Cog were 2.3544 points/year in the Cons[+] and 0.8592 points/year in the Cons[-] groups. Ancillary, changes of DWMLs showed significant correlation with the time span (p < 0.01), and the liner coefficients of DWMLs were 24.48 ml/year in the Cons[+] and 14.83 ml/year in the Cons[-] group, although annual rate of hippocampal atrophy was not different between the two groups. Moreover, serum homocysteine level at baseline was significantly higher in the Cons[+] group than Cons[-] group (14.6 ± 6.4 and 11.5 ± 4.2 nmol/ml, respectively: p = 0.03).

conclusionThere is a significant correlation between constipation and faster progression of AD symptoms along with expansion of DWMLs.

Indexed as

Alzheimer DiseaseCognitive DysfunctionConstipationDisease ProgressionHumansMagnetic Resonance ImagingNeuropsychological TestsRetrospective Studiescognitive functionconstipationdementiahomocysteinemagnetic resonance imagingworsening

Identifiers

PMID35934956
PMCPMC9627372

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.