From 2005 National Health and Nutrition Examination Survey:
[For ages 12 years and older:]
During the past 5 days did you use any product containing nicotine including cigarettes, pipes, cigars, chewing tobacco, snuff, nicotine patches, nicotine gum, or any other product containing nicotine?
Adolescents aged 12 to 17 years are classified as nonsmokers if they respond “no” to using any product containing nicotine in the past 5 days and if their serum cotinine level is less than or equal to 10 ng/mL. Only responses to the questions asked of persons who participated in the examination component of the survey were used, so that serum levels of cotinine could be available for analysis.
The limit of detection for cotinine was revised to 0.05 ng/mL to be more consistent with other similar measures including indicators from Healthy People 2010 and the National Prevention Strategy. Using a lower level of detection of cotinine, may have allowed us to detect cotinine in persons
who are currently categorized as ‘unexposed’.
The limit of detection for cotinine has used for the baseline at launch was 0.015ng/mL. The measure has since been revised to use a limit of detection for cotinine of 0.05ng/mL to be more consistent with other similar measures including indicators from HP2010 and the National Prevention Strategy. As a result of these revisions, the baseline for this measure has been revised from 78.0% to 45.5%. The target has been adjusted from 70.2% to 41.0% using the original target setting method.