Table 4
Percentage distribution of population, by body mass index (BMI) category and sex, based on self-reported, measured and corrected data, household population aged 18 to 79, Canada, 2008

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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 1.2E 0.7 2.0 1.4E 0.8 2.6 1.1E 0.6 1.9 1.1E 0.6 1.9
Normal weight 40.2* 37.2 43.4 30.3 27.4 33.4 33.1* 30.1 36.3 32.1 29.1 35.2
Overweight 40.1 36.9 43.4 42.2 39.2 45.3 43.8 40.5 47.2 42.0 38.8 45.1
Obese 18.5* 16.0 21.2 26.1 23.4 28.9 22.0* 19.4 24.8 24.9 22.3 27.7
p-value Chi-squared test† p=0.00           p=0.00     p=0.20    
Women
Underweight 4.0* 3.0 5.5 2.6E 1.8 3.7 2.9E 2.0 4.3 1.9E 1.2 3.1
Normal weight 50.3* 47.3 53.3 42.4 39.3 45.6 44.4* 41.3 47.6 41.8 38.7 45.0
Overweight 29.6 26.7 32.7 31.7 28.8 34.8 33.3 30.2 36.4 33.5 30.5 36.7
Obese 16.1* 14.2 18.2 23.3 20.8 25.9 19.4* 17.2 21.8 22.8 20.4 25.3
p-value Chi-squared test† p=0.00           p=0.00     p=0.27    
* 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
Source: 2008 Canadian Community Health Survey (subsample).