Asia Pacific Environmental and Occupational Health Journal

The days of the week have significantly more influence towards the trend of hospitalization whilst its relationship with air pollution is unclear. The aim of this paper is to describe the trend of air pollution and cardiorespiratory hospitalizations based on the days of the week trend. A study on time series design study was conducted based on daily basis from 2010 to 2015. Daily cardiorespiratory hospitalizations in a teaching hospital in Kuala Lumpur and concentrations of PM10, CO, NO2, SO2, and O3 were matched. Results showed that cardiorespiratory hospitalizations were lower on the weekend. CO, NO2 and SO2 have higher concentration on weekdays, ozone has higher concentration on weekends whereas PM10 have no certain trend. Based on the day of a week, cardiorespiratory hospitalizations shared the same highest peak on Tuesday with PM10. NO2, SO2 and CO. This findings support the association between hospitalization and air pollution.