Browsing by Author "Wan Rozita Wan Mahiyuddin"
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Item Embargo Children's exposure to air pollution in a natural gas industrial area and their risk of hospital admission for respiratory diseases(Elsevier, 2022) Mohd Faiz Ibrahim; Rozita Hod; Muhammad Abdul Basit Ahmad Tajudin; Wan Rozita Wan Mahiyuddin; Azmawati Mohammed Nawi; Mazrura SahaniThis study aimed to explore the relationship between short-term exposure to air pollution and hospital admissions for respiratory diseases among children in a natural gas industrial area in Bintulu, Malaysia. Daily hospital admissions for respiratory diseases among children were collected from a hospital in Bintulu from 2010 to 2019. Data on six air pollutants (PM10, PM2.5, SO2, NO2, O3, and CO) in the study area were obtained from the Department of Environment Malaysia.Item Embargo Daily temperature effects on under-five mortality in a tropical climate country and the role of local characteristics(Elsevier, 2023) Vera Ling Hui Phung; Kazutaka Oka; Yasushi Honda; Yasuaki Hijioka; Kayo Ueda; Xerxes Tesoro Seposo; Mazrura Sahani; Wan Rozita Wan Mahiyuddin; Yoonhee KimClimate change and its subsequent effects on temperature have raised global public health concerns. Although numerous epidemiological studies have shown the adverse health effects of temperature, the association remains unclear for children aged below five years old and those in tropical climate regions.Item Embargo Environmental variable importance for under-five mortality in Malaysia: A random forest approach(Elsevier, 2022) Vera Ling Hui Phung; Kazutaka Oka; Yasuaki Hijioka; Kayo Ueda; Mazrura Sahani; Wan Rozita Wan MahiyuddinEnvironmental factors have been associated with adverse health effects in epidemiological studies. The main exposure variable is usually determined via prior knowledge or statistical methods. It may be challenging when evidence is scarce to support prior knowledge, or to address collinearity issues using statistical methods. This study aimed to investigate the importance level of environmental variables for the under-five mortality in Malaysia via random forest approach.Item Embargo Health impacts from TRAPs and carbon emissions in the projected electric vehicle growth and energy generation mix scenarios in Malaysia(Elsevier, 2023) Soo Chen Kwan; Sazalina binti Zakaria; Mohd Faiz Ibrahim; Wan Rozita Wan Mahiyuddin; Nurzawani Md Sofwan; Muhammad Ikram A Wahab; Radin Diana R. Ahmad; Ahmad Rosly Abbas; Wei Kian Woon; Mazrura SahaniRoad transport contributes over 70% of air pollution in urban areas and is the second largest contributor to the total carbon dioxide emissions in Malaysia at 21% in 2016. Transport related air pollutants (TRAPs) such as NOx, SO2, CO and particulate matter (PM) pose significant threats to the urban population’s health. Malaysia has targeted to deploy 885,000 EV cars on the road by 2030 in the Low Carbon Mobility Blueprint (LCMB). This study aims to quantify the health co-benefits of electric vehicle adoption from their impacts on air quality in Malaysia. Two EV uptake projections, i.e. LCMB and Revised EV Adoption (REVA) projections, and five electricity generation mix scenarios were modelled up to 2040. We used comparative health risk assessment to estimate the potential changes in mortality and burden of diseases (BoD) from the emissions in each scenario. Intake fractions and exposure-risk functions were used to calculate the burden from respiratory diseasesItem Embargo Risk of concentrations of major air pollutants on the prevalence of cardiovascular and respiratory diseases in urbanized area of Kuala Lumpur, Malaysia(Elsevier, 2019) Muhammad Abdul Basit Ahmad Tajudin; Md Firoz Khan; Wan Rozita Wan Mahiyuddin; Rozita Hodd; Mohd Talib Latif; Ahmad Hazuwan Hamid; Sufian Abd Rahman; Mazrura SahaniaRapid urbanisation in Malaysian cities poses risks to the health of residents. This study aims to estimate the relative risk (RR) of major air pollutants on cardiovascular and respiratory hospitalisations in Kuala Lumpur. Daily hospitalisations due to cardiovascular and respiratory diseases from 2010 to 2014 were obtained from the Hospital Canselor Tuanku Muhriz (HCTM). The trace gases, PM10 and weather variables were obtained from the Department of Environment (DOE) Malaysia in consistent with the hospitalisation data. The RR was estimated using a Generalised Additive Model (GAM) based on Poisson regression. A "lag" concept was used where the analysis was segregated into risks of immediate exposure (lag 0) until exposure after 5 days.Item Embargo Short-term effects of daily air pollution on mortality(Elsevier, 2013) Wan Rozita Wan Mahiyuddin; Mazrura Sahani; Rasimah Aripin; Mohd Talib Latif; Thuan-Quoc Thach; Chit-Ming WongThe daily variations of air pollutants in the Klang Valley, Malaysia, which includes Kuala Lumpur were investigated for its association with mortality counts using time series analysis. This study located in the tropic with much less seasonal variation than typically seen in more temperate climates. Data on daily mortality for the Klang Valley (2000-2006), daily mean concentrations of air pollutants of PM10, SO2, CO, NO2, O3, daily maximum O3 and meteorological conditions were obtained from Malaysian Department of EnvironmentItem Embargo The association between temperature and cause-specific mortality in the Klang Valley, Malaysia(Springer, 2021) Ahmad Norazhar Mohd Yatim; Mohd Talib Latif; Nurzawani Md Sofwan; Fatimah Ahamad; Md Firoz Khan; Wan Rozita Wan Mahiyuddin; Mazrura SahaniThis study aims to examine the relationship between daily temperature and mortality in the Klang Valley, Malaysia, over the period 2006–2015.