Evidence map›Paper›PMID 33739304›Full record

ArticleAging2021

Association between cognitive health and masticatory conditions: a descriptive study of the national database of the universal healthcare system in Japan.

John D Da Silva, Shy Chwen Ni, Cliff Lee, Hawazin Elani, Kailing Ho, Carlos Thomas, Yukinori Kuwajima, Yoshiki Ishida, Takuya Kobayashi, Shigemi Ishikawa-Nagai

Open access · greenAbstract read
In one paragraph

Article in Aging, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
2.8field-weighted citation impact, top 9% of its field
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

11 citing papers in PubMed, 23 citations in OpenAlex.

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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

10 authors at 2 institutions in 2 countries.

John D Da SilvaRestorative Dentistry and Biomaterial Sciences, Harvard School of Dental Medicine, Boston, MA 02115, USA.
Shy Chwen NiOral Medicine, Infection and Immunity, Harvard School of Dental Medicine, Boston, MA 02115, USA.
Cliff LeeOral Medicine, Infection and Immunity, Harvard School of Dental Medicine, Boston, MA 02115, USA.
Hawazin ElaniOral Health Policy and Epidemiology, Harvard School of Dental Medicine, Boston, MA 02115, USA.
Kailing HoDMD Candidate, Harvard School of Dental Medicine, Boston, MA 02115, USA.
Carlos ThomasDMD Candidate, Harvard School of Dental Medicine, Boston, MA 02115, USA.
Yukinori KuwajimaOral Medicine, Infection and Immunity, Harvard School of Dental Medicine, Boston, MA 02115, USA.
Yoshiki IshidaOral Medicine, Infection and Immunity, Harvard School of Dental Medicine, Boston, MA 02115, USA.
Takuya KobayashiIwate Medical University, School of Dental Medicine, Japan.
Shigemi Ishikawa-NagaiOral Medicine, Infection and Immunity, Harvard School of Dental Medicine, Boston, MA 02115, USA.
Harvard University · USIwate Medical University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Cognitive health is subject to decline with increasing numbers of lost teeth which impacts mastication. This study is a descriptive data analysis of the association between masticatory and cognitive conditions using a large database. We obtained the dental and medical records from Japan's universal healthcare system (UHCS) from the national database in 2017. The data from 94% of the Japanese population aged 65 and over is included. It is inclusive of diagnostic codes for various types of cognitive impairment, as well as dental treatment records from 2012 to 2017. The cognitive impairment group was compared to those without a diagnosis of cognitive impairment. Crude odds ratio between loss of mastication with natural teeth (exposure) and cognitive impairments (outcome) were compared. Patients who have lost masticatory function are likely to have cognitive impairment with an odds ratio of 1.89 (p<0.0001) for early elderly (aged 65-75) and 1.33 (p<0.0001) for advanced elderly (over 75). Patients who are edentulous and function with complete dentures are likely to have cognitive impairment with an odds ratio of 2.38 (p<0.0001) and 1.38 (p<0.0001), respectively. The data shows a convincing and significant result of an association between cognitive health and oral health, related to masticatory conditions.

Indexed as

AgedCognitionCognitive DysfunctionComorbidityDatabases, FactualFemaleHumansJapanMaleMasticationMouth, EdentulousOral HealthPrevalenceUniversal Health CareAlzheimer’s diseasecognitive declinedementiadescriptive studymastication

Identifiers

PMID33739304
PMCPMC8034966
OpenAlexW3136729600

What OpenQuestion holds

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LicenceCC BY
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Registered trials

None linked

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.