Browsing by Author "Khairul Nizam Mohd Isa"

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    Evaluation of In-Vehicle Pollutants Exposure during Movement Control Order (MCO) and Respiratory Symptoms Among Bus Drivers in Kota Bahru, Malaysia
    (IOP Publishing, 2022) Zhafir Adam Ayub; Juliana Jalaludin; Khairul Nizam Mohd Isa; NorMohd Razif Noraini
    Exposure to in-vehicle air pollutants has been recognized as a risk factor for respiratory diseases. The present study therefore investigates the factors, including duration of employment and in-vehicle concentrations of fine particulate matter (PM2.5), carbon dioxide (CO2) and nitrogen dioxide (NO2) that can influence the prevalence of respiratory symptoms in commercial bus drivers. A total of 34 bus drivers and 51 administrative staff (comparative group) from the bus operator in Kota Bahru, Malaysia were randomly enrolled in this cross-sectional study. The personal characteristics and respiratory symptoms were reported using a validated questionnaire from the American Thoracic Society (ATS-DLD-78-A). In-vehicle concentrations of PM2.5, CO2 and NO2 were continuously measured over eight hours on each bus driver.
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    School indoor air pollutants: In relation to allergy and respiratory symptoms among school children in urban areas
    (University of Tehran, 2022) Zailina Hashim; Nur Shahira Mohamad Fadzil; Siti Raihan Mohd Fuad; Shamsul Bahari Shamsudin; Khairul Nizam Mohd Isa; Tan Tek Song; Jony Sieman; Saliza Mohd Elias; Jamal Hisham Hashim
    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.