The Impact of Airborne Particulate Matter 2.5 (PM2.5) on Urticaria Patients

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

TCTR

Registry ID

TCTR20230325001

Enrollment

1500

Registered

2023-03-25

Start date

2018-07-01

Completion date

Unknown

Last updated

2026-08-03

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

Conditions

Acute urticaria patients Chronic spontaneous urticaria patients Acute urticaria, chronic spontaneous urticaria

Interventions

Urticaria duration less than 6 weeks,Urticaria duration longer than 6 weeks

Prevention,Prevention

Acute urticaria,Chronic urticaria

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Patients diagnosed with acute urticaria or chronic spontaneous urticaria at dermatology clinic, Phramongkutklao hospital from July1st, 2018 to December 31st, 2019 2. Currently live in Bangkok during that time period

Exclusion criteria

Exclusion criteria: 1)living outside Bangkok 2) diagnosed with chronic urticaria due to other causes such as autoimmune diaseases

Design outcomes

Primary

Measure	Time frame
Chronic urticaria severity Average of the day, month Urticaria activity score 7	—

Secondary

Measure	Time frame
Acute urticaria incidence Average by month Count	—

Countries

Thailand

Contacts

Public ContactTanyaponn Puttisri

Phramongkutklao hospital

Tanya.p1247@gmail.com0810406611

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026