Table 2

Selected investigations of passive smoking and lung function level among adults

Reference no.		Study population		Study period		Exposure assessment		Other exposures		Outcome	Results
Reference no.		Study population		Study period		Periods	Location	Other exposures		Outcome	Results
41	117 never smokers, 15–40 years, Montreal	1980–89	Lifetime and past three days	Home and work	—	Rate of FEV₁ and FEF_25–75 change over 8 years	No relation between ETS exposure and change in lung function
42	1033, 40–69 years, Beijing	1986	Current	Home and work	Occupation, indoor coal stoves	FEV₁ and FVC level	Exposure	FEV ₁ (ml)	FVC (ml)
							Work or home	−121^2-150	−182^2-150
							Work and home	−145^2-150	−189^2-150
43	415 never smokers, 51–95	1988–91	Lifetime	Home	—	FEV₁, FVC, FEF_25–75 level		Non-smokers exposed	Non-smokers not exposed
		years, Southern California										FEV₁(l)
												Men	3.00	3.14
												Women	2.12	2.12
												FVC (l)
												Men	3.90	4.10
												Women	2.72	2.71
												FEF_25–75(l/s)
												Men	2.66	2.80
												Women	2.00	1.99

↵2-150 Estimated decrement in lung function among non-smokers exposed compared to non-smokers not exposed, p<0.05.