Living alone

Intervention2 papers2 findings

C · W · M · H: cells, worms or flies, mice, humans. Dark: independent labs found the same change there. Light: one lab or one study. Outline: nothing yet.

Labs are independent when their papers share no last author and no institution.

Against: findings that point the other way from most findings on the same outcome.

No results posted: trials that ended more than a year ago with no results on ClinicalTrials.gov and no paper in ARN’s record.

Company ties: findings with an author at a company, or from a paper that declares the maker’s interest.

2 independent labs in 1 country

Funders: Japan Society for the Promotion of Science and 1 more

  • Humans2

Outcomes

2

Depression

upin humans1

1 study
  1. Living alone increases depression in humans.

    Humansliving alonemales

    Living Arrangements and Life Without and With Depression in Japan: A Longitudinal Analysis · Journal of aging and health · 9 Sep 2026

Depression →

Dementia

no changein humans1HR 1.03

1 study
  1. Living alone has no effect on dementia in humans (HR = 1.03).

    Humanscommunity-dwelling, dementia-free12 yearsn = 967

    Incident dementia risk by frailty status and living arrangements in older adults · The Journal of frailty & aging · 19 Aug 2026

Dementia →

Funding

National Institute on AgingUS$1.3m2 grants since 2024

Latest

Nov 2025: 0Dec 2025: 0Jan 2026: 0Feb 2026: 0Mar 2026: 0Apr 2026: 0May 2026: 0Jun 2026: 0Jul 2026: 0Aug 2026: 1Sep 2026: 1Oct 2026: 02