Sick building syndrome and indoor air quality in Malaysian bank offices: A cross-sectional analysis.

Sick building syndrome (SBS) encompasses a range of non-specific symptoms experienced by occupants, commonly associated with poor indoor air quality (IAQ). This study investigated the associations between IAQ parameters and SBS symptoms among 124 office workers across six bank offices in Malaysia. Indoor PM2.5, PM10, CO2, TVOC, formaldehyde, temperature and relative humidity were measured using validated instruments, while SBS symptoms were assessed using standardized questionnaire adapted from the Industry Code of Practice of Indoor Air Quality (ICOPIAQ) 2010. Findings revealed that banks using split-unit air conditioning (AC) ventilation had higher concentration of PM2.5 and CO2, exceeding the recommended standards, compared to those using air-conditioning and mechanical ventilation (ACMV) ventilation type. The most prevalent symptoms were headache (47.6 %), cough (44.4 %), irritated and stuffy nose (38.7 %), irritation of eyes (35.5 %), fatigue (25 %), dizziness (25 %), feeling heavy-headed (24.2 %), and skin rash or itchiness (24.2 %). Among these, dizziness was significantly associated with PM2.5, PM10, CO2, and formaldehyde levels. These findings highlight the need for improved ventilation and IAQ management in bank offices. Public policies and interventions at organizational level are essential to mitigate SBS risks and safeguard worker health.