Accuracy of classification of smoking status based on self-reports, household
population aged 12 to 79, Canada, March 2007 to February 2009
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|Urinary cotinine concentration||Self-reported smoker||Self-reported non-smoker|
|%||95% confidence interval||%||95% confidence interval|
|Less than or equal to 50 ng/ml (non-smoker)||1.7||1.1||2.6||98.3||97.4||98.9|
|More than 50 ng/ml (smoker)||91.6||86.3||95.0||8.4||5.0||13.7|
Note: Excludes respondents
who did not have a valid cotinine test result, reported using a medication
with nicotine as an active ingredient in the past month, or reported smoking
cigars or a pipe, or using snuff of chewing tobacco.
Source: 2007 to 2009 Canadian Health Measures Survey.
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