Journal article
Exposure to air pollution and risk of hospitalization for cardiovascular diseases amongst Vietnamese adults: Case-crossover study.
- Nhung NTT Hanoi University of Public Health, Hanoi, Viet Nam; Swiss Tropical and Public Health Institute, Basel, Switzerland; University of Basel, Basel, Switzerland. Electronic address: ntn2@huph.edu.vn.
- Schindler C Swiss Tropical and Public Health Institute, Basel, Switzerland; University of Basel, Basel, Switzerland.
- Chau NQ Bach Mai Hospital, Hanoi, Viet Nam.
- Hanh PT Bach Mai Hospital, Hanoi, Viet Nam.
- Hoang LT Hanoi University of Public Health, Hanoi, Viet Nam.
- Dien TM Vietnam National Children(')s Hospital, Hanoi, Viet Nam.
- Thanh NTN University of Engineering and Technology, Vietnam National University, Hanoi, Viet Nam.
- Künzli N Swiss Tropical and Public Health Institute, Basel, Switzerland; University of Basel, Basel, Switzerland.
- 2019-11-16
Published in:
- The Science of the total environment. - 2020
Ambient air pollution
Arrhythmia
Cardiac disease
Cardiac failure
Cardiovascular disease
Ischemic heart disease
Stroke
Vietnam
Adult
Air Pollutants
Air Pollution
Cardiovascular Diseases
Cities
Cross-Over Studies
Hospitalization
Humans
Particulate Matter
Vietnam
English
BACKGROUND
Associations between hospital admissions and ambient air pollutants in the Vietnamese population have been reported in previous studies. However, most studies were conducted in Hanoi or Hochiminh city. We used hospital records of seven hospitals in Northern Vietnam to investigate short-term associations between ambient air pollutants and hospital admissions due to cardiovascular conditions.
METHODS
We used 135'101 hospital records of residents (age ≥15) living in three provinces (Hanoi, Quang Ninh, and Phu Tho) and daily ambient air pollutant concentrations to estimate percentage changes and 95% confidence intervals for hospital admissions due to seven cardiovascular conditions per interquartile range (IQR) increases in daily ambient air pollutants. We used a time-stratified case-crossover analysis adjusting for meteorological factors, indicators of holidays and influenza epidemics. We also investigated modification of effects by age groups (<65 and ≥65), seasons (cold and hot) and hospital levels (national and province level).
RESULTS
Particulate matter concentrations were positively associated with daily hospital admissions due to most cardiovascular conditions. For example, an increment in the two-day average (lag1-2) level of PM2.5 by one IQR (34.4 µg/m3) was associated with a 6.3% (95%CI: 3.0%-9.8%) increase in the daily count of admissions for ischemic heart disease in Hanoi and with 23.2% (95%CI: 11.1%-36.5%) for cardiac failure in Quang Ninh. Moreover, hospitalisations for stroke in Hanoi and cardiac failure in Phu Tho showed strong positive associations with SO2. The findings also show that estimates varied by age groups, seasons and hospital levels.
CONCLUSION
Ambient air pollutants were associated with daily cardiovascular admissions in Northern Vietnam. The findings underline the important role of ambient air pollutants as a trigger of cardiovascular conditions.
Associations between hospital admissions and ambient air pollutants in the Vietnamese population have been reported in previous studies. However, most studies were conducted in Hanoi or Hochiminh city. We used hospital records of seven hospitals in Northern Vietnam to investigate short-term associations between ambient air pollutants and hospital admissions due to cardiovascular conditions.
METHODS
We used 135'101 hospital records of residents (age ≥15) living in three provinces (Hanoi, Quang Ninh, and Phu Tho) and daily ambient air pollutant concentrations to estimate percentage changes and 95% confidence intervals for hospital admissions due to seven cardiovascular conditions per interquartile range (IQR) increases in daily ambient air pollutants. We used a time-stratified case-crossover analysis adjusting for meteorological factors, indicators of holidays and influenza epidemics. We also investigated modification of effects by age groups (<65 and ≥65), seasons (cold and hot) and hospital levels (national and province level).
RESULTS
Particulate matter concentrations were positively associated with daily hospital admissions due to most cardiovascular conditions. For example, an increment in the two-day average (lag1-2) level of PM2.5 by one IQR (34.4 µg/m3) was associated with a 6.3% (95%CI: 3.0%-9.8%) increase in the daily count of admissions for ischemic heart disease in Hanoi and with 23.2% (95%CI: 11.1%-36.5%) for cardiac failure in Quang Ninh. Moreover, hospitalisations for stroke in Hanoi and cardiac failure in Phu Tho showed strong positive associations with SO2. The findings also show that estimates varied by age groups, seasons and hospital levels.
CONCLUSION
Ambient air pollutants were associated with daily cardiovascular admissions in Northern Vietnam. The findings underline the important role of ambient air pollutants as a trigger of cardiovascular conditions.
- Language
-
- English
- Open access status
- closed
- Identifiers
-
- DOI 10.1016/j.scitotenv.2019.134637
- PMID 31731158
- Persistent URL
- https://sonar.ch/global/documents/73278
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