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Obesity and Body Mass Index: Differences between Canadian and American Adults:Findings from the Joint Canada/United States Survey of Health (JCUSH): 

Obesity and Body Mass Index: Differences between Canadian and American Adults: Findings from the Joint Canada/United States Survey of Health (JCUSH) Jane F. Gentleman, Ph.D., Debra L. Blackwell, Ph.D., and Michael Martinez, MPH, MHSA National Center for Health Statistics Centers for Disease Control and Prevention The findings and conclusions in this paper are those of the authors and do not necessarily represent the views of the National Center for Health Statistics, Centers for Disease Control and Prevention.

Slide2: 

From the Winnipeg Sun and Edmonton Sun, June 3, 2004: Yank Women Fatter Ottawa – When it comes to obesity, American women tip the scales compared with their Canadian sisters, a cross border health study confirms for the first time. Overall, 21% of Americans were obese compared with 15% of Canadians, says the study released yesterday by Statistics Canada and the U.S. National Center for Health Statistics…. continued…..

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Previous research has suggested obesity may be more prevalent in the United States, but this is the first definitive confirmation, said Diane Finegood, a scientific director of the Canadian Institutes for Health Research (CIHR). 'Whenever I go down there I think, God, there really is a difference, but this is in fact the first data I’m aware of where a survey was done at the same time in Canada and the United States with the same question and the same methodology by the same people,' said Finegood. (Emphasis added.)

Today: 

Today Comparisons (obesity rates andamp; Body Mass Index): Canadians vs. Americans Women vs. men Women vs. women Focus on race/ethnicity differences What other factors might explain the differences for women?

Body Mass Index (BMI): 

Body Mass Index (BMI) BMI = Weight / Height2 (in kilograms and meters)

DEFINITIONS: 

DEFINITIONS Underweight: BMI andlt; 18.5 Normal weight: 18.5 ≤ BMI andlt; 25 Overweight: 25 ≤ BMI andlt; 30 Obese: 30 ≤ BMI based on World Health Organization (WHO) standards

Obesity rates in JCUSH: 

Obesity rates in JCUSH Blue font = statistically significant difference between Canada and U.S. (at 0.05 level)

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Distribution of BMI for Canadian men X-axis = BMI metric Y-axis = Proportion (weighted) of population

Slide9: 

Distribution of BMI for U.S. men X-axis = BMI metric Y-axis = Proportion (weighted) of population

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Distribution of BMI for Canadian men (black) andamp; U.S. men (blue) Legend U.S. men Canadian men X-axis = BMI metric Y-axis = Proportion (weighted) of population

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X-axis = BMI metric Y-axis = Proportion (weighted) of population Distribution of BMI for Canadian women

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Distribution of BMI for U.S. women X-axis = BMI metric Y-axis = Proportion (weighted) of population

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Distribution of BMI for Canadian women (green) andamp; U.S. women (red) Legend U.S. women Canadian women X-axis = Y-axis = X-axis = BMI metric Y-axis = Proportion (weighted) of population

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Distribution of BMI for U.S. women andamp; U.S. men Legend U.S. women U.S. men X-axis = BMI metric Y-axis = Proportion (weighted) of population

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Distribution of BMI for Canadian women andamp; Canadian men Legend Canadian women Canadian men X-axis = BMI metric Y-axis = Proportion (weighted) of population

% overweight and obese, by race, women only : 

% overweight and obese, by race, women only

Results of multivariate analysis, women onlyOdds ratios for being obese, by race/ethnicity: 

Results of multivariate analysis, women only Odds ratios for being obese, by race/ethnicity Blue font = statistically significant

Slide18: 

Distribution of BMI for Canadian white women X-axis = BMI metric Y-axis = Proportion (weighted) of population

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Distribution of BMI for Canadian other women X-axis = BMI metric Y-axis = Proportion (weighted) of population

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Distribution of BMI for Canadian women by race Legend White women Other women X-axis = BMI metric Y-axis = Proportion (weighted) of population

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Distribution of BMI for U.S. Non-Hispanic white women X-axis = BMI metric Y-axis = Proportion (weighted) of population

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Distribution of BMI for U.S. Non-Hispanic black women X-axis = BMI metric Y-axis = Proportion (weighted) of population

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Distribution of BMI for U.S. Non-Hispanic other women X-axis = BMI metric Y-axis = Proportion (weighted) of population

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Distribution of BMI for U.S. Hispanic women X-axis = BMI metric Y-axis = Proportion (weighted) of population

Slide25: 

Distribution of BMI for U.S. women, by race/ethnicity Legend Hispanic women NH-white women NH-black women NH-other women X-axis = BMI metric Y-axis = Proportion (weighted) of population

Slide26: 

Distribution of BMI for Canadian women and U.S. NH-white women Legend Canadian women U.S. NH-white women X-axis = BMI metric Y-axis = Proportion (weighted) of population

Slide27: 

Distribution of BMI for Canadian women andamp; U.S. NH-black women Legend Canadian women U.S. NH-black women X-axis = BMI metric Y-axis = Proportion (weighted) of population

Slide28: 

Distribution of BMI for Canadian women and U.S. Hispanic women Legend Canadian women U.S. Hispanic women X-axis = BMI metric Y-axis = Proportion (weighted) of population

Other big differencesassociated with obesitybetween Canadian & American women: 

Other big differences associated with obesity between Canadian andamp; American women Age Education Income Self-reported health status Leisure-time physical activity Having a regular medical doctor