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Table 4–3(Continued). Summary of cross-sectional studies that used questionnaires to assess the health effects of indoor air contaminants in general or CCP specifically

	Study	Country	Methods	CCP-exposed workers			Results
				Number responding to survey[1]	Workers with complaints
					Number	%
	Jaakkola and Jaakkola 1999	Finland	Authors conducted a population-based, crosssectional questionnaire study of workers in 41 office buildings working with CCP, photocopying, and using VDT’s.	910	Unknown	Unknown	Statistically significant associations (ORs) observed between work with CCP (34% of population) and symptoms such as eye (OR=1.56), nose (OR=1.48), pharyngeal (OR=1.89), and skin symptoms (OR=1.68); headache (OR=1.66); and lethargy (OR=1.38). The ORs for chronic respiratory symptoms and some measures of respiratory infection (acute bronchitis and sinusitis) were significantly elevated (ORs=1.3–1.8). In contrast, only the OR for the common cold was significantly elevated in those performing photo-copying, as were the ORs for otitis and general symptoms in those using VDTs.

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See footnotes at end of table.

1. The number of CCP-exposed workers surveyed was not generally known except for those responding to the surveys; therefore, response rates were unknown.