Obesity: Rates of self-reported obesity highest among middle-aged
According to the 2007 CCHS, 4 million people aged 18 or older, 16% of the total, reported data on weight and height that put them in the obese category. Another 8 million, or 32%, were overweight.
The percentage of Canadians who are overweight or obese rose dramatically between 1985 and 1994/1995 but appears to have stabilized more recently.
Between 2005 and 2007, rates of both overweight and obesity generally changed little. During that period, there was a slight increase in the proportion of women aged 18 to 24 who were obese, and a decrease in the proportion of senior men who were overweight.
Self-reported obesity rates were generally highest among individuals aged 45 to 64. One-fifth (20%) of men in this age group were obese, as were 18% of women. The proportion who were overweight also tended to peak in middle-age.
Rates of overweight and obesity were lowest among those aged 18 to 24 both for men and women. However, men aged 25 to 44 were considerably more likely than their female counterparts to be obese.
Among the provinces, rates of obesity were highest in Saskatchewan, Alberta and Atlantic Canada, ranging from 18% in Alberta to a high of 22% in Newfoundland and Labrador. The lowest rates were in British Columbia where only 11% of adults were obese.
Being overweight is a risk factor for chronic conditions such as type 2 diabetes and heart disease. Not surprisingly, individuals who were overweight or obese were more likely to have these conditions than were individuals whose Body Mass Index was in the normal range. Similarly, overweight and obese adults were less likely to rate their health as excellent or very good than were adults not carrying excess weight.
A separate study released today in Health Reports (82-003-XWE, free) found strong evidence of a positive association between sedentary activities and obesity among both sexes.
Because of the tendency of respondents to over-report their height and under-report their weight, it is likely that these figures from the CCHS underestimate the actual prevalence of obesity and overweight.