Association between creatinine-adjusted and unadjusted urine cotinine values in children and the mother's report of exposure to environmental tobacco smoke
✍ Scribed by Peter A. Fried; Sherry L. Perkins; Barbara Watkinson; Joel S. McCartney
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 618 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0009-9120
No coin nor oath required. For personal study only.
✦ Synopsis
Objective: To examine the association between parents' report of their child's secondhand smoke exposure and various adjustments of cotinine concentrations in random urine samples. Methods: Urine cotinine and creatinine were measured in 109 six to 11-year-old children from predominantly upper middleclass families. Cotinine values were considered as: (a) unadjusted, (b) as a cotinine/creatinine ratio, (c) as adjusted based on a regression relationship between cotinine and creatinine, and (d) and (e) as a cotinine/creatinine ratio adjusted for age and sex. Results: Little overlap in cotinine values occurred between exposed and nonexposed children, and a dose-response relationship was noted between the parental report and the urine cotinine values (r = 0.67). A modest improvement occurred in the correlation when the cotinine/creatinine ratio was considered. Considering exposure to cigarette smoke outside the home as well as in the household only improved the correlation when the former exposure was heavy. A high degree of concordance exists between the parents' report of exposure and the child's urine cotinine. Conclusions: The value of adjusting this biochemical parameter by various means may be a function of the particular sample being investigated, suggesting no one method is universally appropriate.