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Indoor concentrations of particulate matter 2.5 in a pediatric emergency service
Catiane Zanin Cabral1, Alan da Silveira Fleck1, Fernanda Chaves Amantéa1
1Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brazil.
Insights
Pediatric emergency waiting rooms often have high levels of fine particulate matter (PM2.5). Increased occupancy significantly correlates with higher PM2.5 concentrations, especially during autumn.
Area of Science:
- Environmental Health
- Pediatric Public Health
- Air Quality Monitoring
Background:
- Waiting rooms in pediatric emergency services are high-traffic areas.
- Assessing indoor air quality is crucial for vulnerable populations.
- Particulate matter (PM2.5) poses significant health risks.
Purpose of the Study:
- To evaluate air quality in a pediatric emergency waiting room.
- To measure serial concentrations of fine particulate matter (PM2.5).
- To determine the influence of room occupancy on PM2.5 levels.
Main Methods:
- A cross-sectional study was conducted over one year in Porto Alegre.
- Real-time PM2.5 monitoring was performed using a DustTrak II aerosol monitor.
- Occupancy counts and climatic data were recorded; statistical analyses included ANOVA and Pearson's correlation.
Main Results:
- Elevated PM2.5 levels were observed across all seasons.
- A significant increase in PM2.5 occurred during autumn (p<0.001).
- Higher occupancy correlated with increased PM2.5 (p=0.026), confirmed by a strong positive correlation (r=0.738, p<0.001).
Conclusions:
- Pediatric emergency waiting rooms consistently exhibit elevated PM2.5.
- The number of people present directly influences PM2.5 concentrations.
- Occupancy is a key factor affecting indoor air quality in these settings.
Objective:
To evaluate air quality in the waiting room of a pediatric emergency service considering the serial concentrations of particulate matter (PM2.5), and to determine if the number of people present in the room can have an influence on the pollutant concentrations.
Methods:
Cross-sectional study, carried out in the waiting room of a reference pediatric hospital in the city of Porto Alegre, conducted in a one-year period, in a continuous-time sample including all of the four seasons of the year. The monitoring of PM2.5 was performed using a real-time aerosol monitor (DustTrak II). The number of people in the room was determined every hour and the climatic characteristics per daily mean. The concentration of PM2.5 and the number of people were expressed by mean and standard deviation. The means were compared by Analysis of Variance and Pearson's correlation coefficient.
Results:
There was a significant increase in the concentration of PM2.5 in the autumn, when compared to other seasons (p<0.001). The pollutant increase, in this season, was accompanied by the higher number of people in the emergency room (p=0.026). The association between PM2.5 and the number of people is confirmed by the positive correlation between these two variables (r=0.738; p<0.001).
Conclusions:
The pediatric emergency waiting room showed elevated PM2.5 in all seasons. The number of people in the room had a positive correlation with the concentration of the pollutant in the environment.
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