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A principal component analysis of perception and SBS symptoms of office workers in the tropics at two temperatures and two ventilation rates

K.W. Tham, H.C. Willem, 2003
ventilation rate | hot climate | sick building syndrome | temperature
Bibliographic info: Healthy Buildings 2003 - Proceedings 7th International Conference (7th-11th December 2003) - National University of Singapore - Vol. 3, pp 88-94, 5 Fig.., 2 Tab., 15 Ref.
Languages: English

Correlation analysis of subjective responses of tropically acclimatized office workers in a fieldstudy conducted over nine continuous weeks using a 2 2 balanced design with temperatureand fresh air ventilation rates as control variables revealed that several related SBS symptomsare highly correlated. Thermal comfort and acceptability of air quality exhibit a strongcorrelation, whereas perceived indoor environmental variables have poor correlations amongthemselves. Principal component analysis further improved measures to variability bycombining coherent variables into six factors. Analysis of variance of factor scores derived foreach factor suggested that thermal comfort induced by temperature changes plays an importantrole in the occupants perception and reported SBS symptom intensity. The acceptability ofair quality-thermal comfort and perceived indoor environmental factors were significantlyinfluenced by temperature rather than the fresh air levels interventions. Behaviouralsymptoms factor was significantly correlated with perceived indoor environmental qualityfactor (R2 = 0.70).


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