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

Tran Thi Anh Thu1, Tran Ngoc Dang2, Tran Khanh Huyen3, Pham Dinh Toan4, Le Huynh Nhu4
1 Binh Thanh Medical Center
2 University of Medicine and Pharmacy at Ho Chi Minh City
3 Tan Phu Medical center
4 Le Van Thinh Hospital

Main Article Content

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.

Article Details

References

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