Table 2
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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Table 2
Accuracy of classification of smoking status based on self-reports, household population aged 12 to 79, Canada, March 2007 to February 2009 .
Table summary
This table displays the results of Accuracy of classification of smoking status based on self-reports. The information is grouped by Urinary cotinine concentration appearing as row headers and is grouped by Self-reported smoker (%,95% confidence interval (from, to)) and Self-reported non-smoker (%,95% confidence interval (from, to)) appearing as column headers using % as a unit of measure.
Urinary cotinine concentration Self-reported smoker Self-reported non-smoker
% 95% confidence interval % 95% confidence interval
from to from to
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.