Survey on the international significance of the sense of smell across multiple age groups

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00038834

Enrollment

2475

Registered

2025-12-29

Start date

2025-12-24

Completion date

Unknown

Last updated

2026-01-12

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

Conditions

Z00.0

Interventions

Group 1: Participants from different countries fill out the questionnaire. There are three age groups: 10-12 years, 20-30 years, and over 60 years.

Eligibility

Sex/Gender

All

Age

10 Years to No maximum

Inclusion criteria

Inclusion criteria: Age by group: 10–12 years 20–30 years Over 60 years

Exclusion criteria

Exclusion criteria: Major underlying diseases: Diabetes mellitus Kidney disease Epilepsy Acute allergies with allergic rhinitis Known olfactory disorders Cognitive impairments, especially regarding language comprehension Anosmia or hyposmia (complete or partial loss of smell)

Design outcomes

Primary

Measure	Time frame
Primary objectives: Recording the importance of smell in different age groups internationally Parameters to be collected: Importance of smell in relation to the entities of danger, nutrition, social and spatial orientation	—

Secondary

Measure	Time frame
Differences between countries, regions or continents	—

Countries

China, France, Germany, Greece, India, Italy, Japan, Netherlands, Poland, Portugal, Russia, Spain, Sweden, Turkey, United Arab Emirates, United Kingdom, United States

Contacts

Public ContactJanine Gellrich

Universitätsklinikum Dresden

janine.gellrich@ukdd.de+49

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 4, 2026