1 Oregon Health Sciences University, Portland, OR 97201
Two studies have been published in which the major purpose was to reduce infant exposure to environmental tobacco smoke (ETS) by moving the source of the smoke away from the infant.1,2, Neither study showed a reduction in mean infant urine cotinine levels although Greenberg and associates did find a reduction in reported smoke exposure and a reduction in persistent respiratory symptoms in lower socioeconomic level children. One may interpret the data of Greenberg et al to mean that mothers in the intervention group knew the right thing to say in response to a survey.