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Sci Total Environ

Title:		Personal and demographic factors and change of subjective indoor air quality reported by school children in relation to exposure at Swedish schools: a 2-year longitudinal study
Author(s):		Wang J; Smedje G; Nordquist T; Norback D;
Address:		"Department of Medical Sciences, Uppsala University, 75185 Uppsala, Sweden; University Hospital, 75185 Uppsala, Sweden. Electronic address: juan.wang@medsci.uu.se. Department of Medical Sciences, Uppsala University, 75185 Uppsala, Sweden; University Hospital, 75185 Uppsala, Sweden"
Journal Title:		Sci Total Environ
Year:		2015
Volume:		20141206
Issue:
Page Number:		288 - 296
DOI:		10.1016/j.scitotenv.2014.12.001
ISSN/ISBN:		1879-1026 (Electronic) 0048-9697 (Linking)
Abstract:		"This paper studies changes in subjective indoor air quality (SIAQ) among school children and relates these data to repeated exposure measurements during a two-year follow-up period. Data on SIAQ and demographic information were gathered by a questionnaire sent to 1476 primary and secondary school pupils in 39 randomly selected schools at baseline and after two years (follow-up). Exposure measurements were applied after questionnaire data were collected at baseline and follow-up in approximately 100 classrooms. The arithmetic mean values for baseline and follow-up were: for indoor air temperature 23.6 degrees C and 21.8 degrees C and for outdoor air flow rate 5.4 L/s and 7.9L/s. Older children, those with atopy at baseline, and those in larger schools reported impaired SIAQ during follow-up. Installation of new ventilation systems, higher personal air flow rate and air exchange rate, and better illumination were associated with improved SIAQ. Higher CO2 levels were associated with impaired SIAQ. In conclusion, sufficient ventilation and illumination in classrooms are essential for the perception of good indoor air quality"
Keywords:		"Air Pollution, Indoor/*statistics & numerical data Child Demography *Environmental Monitoring Female Humans Longitudinal Studies Male Schools/*statistics & numerical data Sweden Temperature Ventilation/statistics & numerical data Building dampness Carbon;"
Notes:		"MedlineWang, Juan Smedje, Greta Nordquist, Tobias Norback, Dan eng Research Support, Non-U.S. Gov't Netherlands 2014/12/09 Sci Total Environ. 2015 Mar 1; 508:288-96. doi: 10.1016/j.scitotenv.2014.12.001. Epub 2014 Dec 6"