The study completed in collaboration with the Heart and Stroke Foundation of Ontario looked at 2,552 Ontarians between the ages of 20 and 79 from communities across the province.
The survey revealed 48 per cent of adults were classified as overweight, and another 22 per cent were obese, with levels of obesity increasing with age.
Five years ago, health officials say the combined number was much lower.
Although doctors say obese people in Canada are a minority, almost every second person is overweight.
Among the subjects classified as obese, instances of high blood pressure, high cholesterol and diabetes were two to three times higher than people classified as overweight.
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