Chest
Clinical Investigations: AsthmaReduction of Environmental Tobacco Smoke Exposure in Asthmatic Children: A 2-Year Follow-up
Section snippets
Design
Original Study: A three-group repeated measures design was employed in the initial study. Ninety-one families with at least one parent who smoked cigarettes and a child (6 to 17 years) with asthma who was exposed to at least one of the parent's cigarettes per day were recruited from among patients at four of the largest pediatric allergy medical centers in San Diego. Screening forms obtained from the medical centers were reviewed and eligible families were invited to participate in a study of
RESULTS
The counseling group included an outlying data point at baseline (25 cigarettes per day), and the control group included two outliers at baseline (30 and 40 cigarettes per day). Distributions of the exposure variables were moderately skewed at most measurement points. Outlying cases were retained in the data set, and dependent variables for all analyses were transformed using natural logarithms (after adding a value of 1 to all scores to remove zero values). Means of these logs of target
DISCUSSION
These ETS data demonstrate an initial reactivity among participants in all groups, followed by a greater decrease in exposure in the counseling group. This was followed by stabilization or slight increase for the control subjects and sustained or slightly decreased exposure for the counseling group, but general stability during the 6- to 12-month initial follow-up period. The overall effect was maintained throughout the entire 30-month period even in the context of the observed change
REFERENCES (9)
- et al.
Reduction of environmental tobacco smoke exposure among asthmatic children: a controlled trial
Chest
(1994) - et al.
The accuracy of environmental tobacco smoke exposure measures among asthmatic children
J Clin Epidemiol
(1995) Respiratory health effects of passive smoking: lung cancer and other disorders
(1993)- et al.
Trial of an intervention to reduce passive smoking in infancy
Pediatr Pulmonol
(1987)
Cited by (0)
This research was supported in part by grants from the Cigarette and Tobacco Surtax Fund of the State of California through the Tobacco-Related Disease Research Program of the University of California, grant 4RT-0092, and from the National Heart, Lung, and Blood Institute, National Institutes of Health, grant 1 R18 HL52835 01A1, and from San Diego State University.