Articles Vol. 65 No. CĐ 6 - Bệnh viện Lê Văn Thịnh 31/07/2024

24. A MODEL OF FACTORS CONTRIBUTING TO PERSONAL EXPOSURE TO PM2.5 IN HO CHI MINH CITY

Tran Thi Anh Thu1,2, Tran Ngoc Dang3,4, Tran Khanh Huyen5,6, Pham Dinh Toan7,8, Le Huynh Nhu7,8
1 Binh Thanh Medical Center
2 Trung tâm y tế quận Bình Thạnh
3 University of Medicine and Pharmacy at Ho Chi Minh City
4 Đại học Y Dược Thành phố Hồ Chí Minh
5 Tan Phu Medical center
6 Trung tâm y tế quận Tân Phú
7 Le Van Thinh Hospital
8 Bệnh viện Lê Văn Thịnh
Corresponding author: Trananhthu1102@gmail.com
DOI: 10.52163/yhc.v65iCD6.1379
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Keywords
PM2.5, personal exposure, contributed factors, predicted model
Abstract

Objectives: To build a model of factors contributing to personal exposure to PM2.5. Included factors were background characteristics, location, transportation, activities, ventilation status, air quality.

Methods: A longitudinal follow-up study conducted on 36 volunteers in Ho Chi Minh City. They wore PM2.5 measuring devices for 2 consecutive days and completed corresponding Time-activity diaries (TAD).

Results: The median PM2.5 concentration level was 14 µg/m3. The Bayesian Model Average (BMA) determined the contribution of factors including 8 variables: Age, weekend, humidity, rain, outdoor location, smell of smoke, smell of dust, eating in a restaurant had the lowest BIC of -436.4, explaining 29.6% of the variation in personal PM2.5 exposured. Smoke-smelling environments contributed the highest at 17%. The following factors were the age, rain, outdoor location, and weekends which contributed about 2-4%. The factors of humidity, dusty environment and eating in a cafeteria/restaurant contribute less than 1%.

Conclusion: It is necessary to control smoke from restaurants and eateries to reduce personal exposure to PM2.5 in Ho Chi Minh City.

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