The effect of continuous use of odor in elderly subjects

The effect of continuous use of odor in elderly subjects - Odor stimuli and cognitive function

Status

Active, not recruiting

Phases

Phase 1

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000033776

Enrollment

Registered

2018-08-20

Start date

2018-09-10

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy elderly subjects

Interventions

Assigning to smell target odor once a day for one month, and writing diaries every day. Assigning to smell placebo odor once a day for one month, and writing diaries every day. Assigning to not sme

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Healthy elderly subjects

Exclusion criteria

Exclusion criteria: -Subjects with psychiatric illness, past cerebral infarction, and subjects diagnosed as sinusitis or nasal allergy havinganosmia in the past. -Subjects now having sinusitis, symptom of nasal allergy with nasal discharge or nasal congestion. -Subjects now receiving regular outpatient treatment and having nasal allergy and anosmia.

Design outcomes

Primary

Measure	Time frame
Evaluation of cognitive functions after one-month continuous odor stimuli.	—

Secondary

Measure	Time frame
Evaluation of subjective feeling of their health and activityafter one-month continuous odor stimuli.	—

Countries

Japan

Contacts

Public ContactYuri Masaoka

Showa University School of Medicine Department of Physiology

faustus@med.showa-u.ac.jp+81-3-3784-8113

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026