Methodology
This is a cross-sectional comparative study conducted on 139 office workers who are registered as staff, have worked for at least four months, including males and females from both new and old buildings. The aim of this study was to determine the level of indoor air quality and its relationship with the increasing level of chemical indoor airborne pollutants and its association with sick building syndrome in two office buildings (which are categorised as new and old buildings) in Universiti PutraMalaysia, Serdang Selangor, Malaysia.The old building is an administrative building of Universiti Putra Malaysia while the new building provides space for the Faculty of Medicine and Health Sciences and the Faculty of Engineering.These locations were chosen because both of the new and old buildings used centralized air conditioning systems and the offices are completely depending on the ventilation providing sufficient air for the occupants in the buildings.