School Indoor Air Pollutants: In Relation to Allergy and Respiratory Symptoms among School Children in Urban Areas

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Hashim Zailina; Mohamad Fadzil Nur Shahira; Mohd Fuad Siti Raihan; Shamsudin Shamsul Bahari; Mohd Isa Khairul Nizam; Song Tan Tek; Sieman Jony; Mohd Elias Saliza; Hashim Jamal Hisham

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Journal Paper

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Journal: POLLUTION Year:2022 | Volume:8 | Issue:3 Page(s): 948-962

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Title

School Indoor Air Pollutants: In Relation to Allergy and Respiratory Symptoms among School Children in Urban Areas

Author(s)

Keywords

ChildrenQ4

SchoolQ4

Indoor air qualityQ4

respiratory symptomsQ4

Allergic symptomsQ4

Abstract

Indoor air pollutants affect Children’s health and previous research mostly focuses on respiratory and allergic diseases. However, little is known about the risks among School Children in East Malaysia. Therefore, we studied associations between School Children’s respiratory and Allergic symptoms and indoor air pollutants in Schools in Sabah, Malaysia. We randomly enrolled 332 School Children (14 years old) from 24 classrooms in 6 secondary Schools in Kota Kinabalu, Sabah. Information on personal characteristics, respiratory and Allergic symptoms were gathered by using a standard questionnaire. The skin prick test was used to characterize the atopy. In each classroom, the indoor concentrations of particulate matter (PM10 and PM2.5), nitrogen dioxide (NO2), formaldehyde, total volatile organic compounds (TVOC), carbon dioxide (CO2) temperature and relative humidity were monitored. Overall, 11.7% reported doctor-diagnosed asthma, 14.8% wheezing, 17.5% day-time breathlessness, 37.0% breathlessness after exercise, 13.0% breathlessness at night-time, 55.1% rhinitis and 10.8% skin allergic in the last 12 months. Regression analysis showed that the onset of wheezing was common in doctor-diagnosed asthma (OR= 8.29, 95% CI= 3.70-16.10) and with parental asthma/allergy (OR= 2.13, 95% CI= 1.10-4.15), and associated with concentrations of NO2 (OR= 1.03, 95% CI= 1.01-1.21) and CO2 (OR= 1.01, 95% CI= 1.01-1.11). Day-time breathlessness was associated with indoor NO2 (OR=1.02, 95% CI= 1.02-1.35) and TVOC (OR= 1.30, 95% CI= 1.10-1.52). The indoor concentrations of NO2, CO2, TVOC and PM2.5 as well as parental asthma/allergy, and parental smoking were associated with the outcome of respiratory and Allergic symptoms.

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