Table 6
Percentage distribution of population, by body mass index (BMI) category and sex, based on self-reported, measured and corrected data for full 2007 to 2008 Canadian Community Health Survey, household population aged 18 to 79, Canada

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BMI category Self-reported Measured Corrected
Based on 2007 to 2009 Canadian Health Measures Survey Based on 2005 Canadian Community Health Survey
% 95% confidence interval % 95% confidence interval % 95% confidence interval % 95% confidence interval
from to from to from to from to
Men
Underweight 1.1 1.0 1.3 1.4E 0.8 2.6 0.9 0.8 1.1 0.9 0.8 1.1
Normal weight 40.0* 39.3 40.7 30.3 27.4 33.4 33.6* 32.9 34.3 32.7 32.0 33.3
Overweight 40.5 39.8 41.3 42.2 39.2 45.3 43.9 43.2 44.6 41.9 41.2 42.6
Obese 18.3* 17.8 18.8 26.1 23.4 28.9 21.6* 21.1 22.2 24.5 23.9 25.0
p-value Chi-squared test† p=0.00           p=0.00     p=0.23    
Women
Underweight 4.1* 3.8 4.4 2.6E 1.8 3.7 2.5 2.2 2.7 2.0 1.8 2.2
Normal weight 52.7* 52.0 53.3 42.4 39.3 45.6 48.4* 47.8 49.1 45.8* 45.2 46.4
Overweight 27.1* 26.5 27.7 31.7 28.8 34.8 30.3 29.7 30.9 30.1 29.5 30.7
Obese 16.1* 15.7 16.6 23.3 20.8 25.9 18.8* 18.3 19.3 22.1 21.6 22.7
p-value Chi-squared test† p=0.00           p=0.00     p=0.17    
* significantly different from measured estimate (p < 0.05)
† result of Chi-squared test comparing self-reported/corrected BMI distribution with measured distribution
E use with caution
Note: Measured estimates are based on the 2008 Canadian Community Health Survey subsample. Self-reported and corrected estimates are based on the full 2007 to 2008 Canadian Community Health Survey sample.
Sources: 2007 to 2008 Canadian Community Health Survey (full sample); 2008 Canadian Community Health Survey (subsample).