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Several possible studies

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What's the relationship between diabetes and dementia? - Harvard Health (opens in a new tab)

health.harvard.edu · 2021-07-12

Short answerEvidenceSource

Short answer

Several possible studies

No clear answer.

More than one paper fits the article's details, and none fits well enough to single out. Checking claims against the wrong study would be worse than not checking them at all.

Checked against the study summary. The full text wasn't available, so some details couldn't be settled either way.

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NewsLink checks it

Several studies could be the source of this story.

More than one paper fits the article's details, and none fits well enough to single out. Checking claims against the wrong study would be worse than not checking them at all.

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Several studies could fit.

More than one paper fits the article's details, and none fits well enough to single out. Checking claims against the wrong study would be worse than not checking them at all.

Source paper

Source layer

The 2 papers the story cites

Source study separated from background citations.

The research anchor for the report.

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The papers it could be

Nearby papers when the source is unclear.

and 13 more considered

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Evidence layer

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What the story asserts. With no source study, there is nothing to check these against.

Claim 1 of 7Not checkedA newly published study examined the association between age of onset of diabetes and the development of dementia using a large, ongoing cohort study.View evidenceHide evidence

Not checked

NewsLink could not identify one source study, so this claim was not compared against a paper.

Claim 2 of 7Not checkedThe cohort began in 1985–88 among 10,308 employees aged 35 to 55 years in London-based government departments, with diabetes exposure data collected at ages 55, 60, 65, and 70.View evidenceHide evidence

As stated10,308 employees; ages 35 to 55 years; 1985–88

Not checked

NewsLink could not identify one source study, so this claim was not compared against a paper.

Claim 3 of 7Not checkedDementia due to any cause was the primary outcome measure.View evidenceHide evidence

Not checked

NewsLink could not identify one source study, so this claim was not compared against a paper.

Claim 4 of 7Not checkedFrom 1985 to 2019, 1,710 cases of diabetes and 639 cases of dementia were recorded.View evidenceHide evidence

As stated1,710 diabetes cases; 639 dementia cases

Not checked

NewsLink could not identify one source study, so this claim was not compared against a paper.

Claim 5 of 7Not checkedFor every 1,000 people examined yearly, the rates of dementia were 8.9 in those without diabetes at age 70, compared with 10.0 for those whose diabetes began up to five years earlier, 13.0 for those whose diabetes began six to 10 years earlier, and 18.3 for those whose diabetes began more than 10 years earlier.View evidenceHide evidence

As stated8.9, 10.0, 13.0, and 18.3 per 1,000 person-years

Not checked

NewsLink could not identify one source study, so this claim was not compared against a paper.

Claim 6 of 7Not checkedThe article concludes that the earlier you develop diabetes, the greater your risk is for developing dementia.View evidenceHide evidence

Not checked

NewsLink could not identify one source study, so this claim was not compared against a paper.

Claim 7 of 7Not checkedThe article says diabetes may contribute to dementia through cardiovascular disease and strokes, hypoglycemia-related brain injury, and possibly direct effects on Alzheimer’s disease.View evidenceHide evidence

Not checked

NewsLink could not identify one source study, so this claim was not compared against a paper.

Finally, the search trail

Method layer

No single source study was found.

NewsLink still surfaces nearby research so you can inspect the field instead of a single paper.

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No exact source, but these papers are close.

Crossref, PubMed, Europe PMC · 17 candidate papers

Candidate

Review for "Age of type 1 diabetes onset and dementia risk: a Swedish nationwide, register-based cohort study"

2026 · Crossref

Source (opens in a new tab)

And 12 more candidates considered.