The impact on human by nature

Evaluation of the effect of natural air quality on human on human

Status

Active, not recruiting

Phases

Phase 1

Study type

Interventional

Source

JPRN

Registry ID

JPRN-jRCT1040210126

Enrollment

Registered

2022-01-09

Start date

2022-01-24

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

Healty person

Interventions

Air quality exposure in nature or indoor space

Air quality, exposure

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. A healthy person 2. Person with normal blood pressure

Exclusion criteria

Exclusion criteria: 1. Those who have underlying illness 2. Those who take more than 200 mL of blood within 4 week 3. Those who is judged as an inappropiated person for tests by doctor

Design outcomes

Primary

Measure	Time frame
the difference of the number or activity of immune cell between before and after exposure	—

Secondary

Measure	Time frame
the difference of the level of secreted cytokines between before and after exposure	—

Contacts

Public ContactTakeo Saito

Fujita Health University

saitou@fujita-hu.ac.jp+81-562-93-9094

Outcome results

None listed

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