(my emphasis)In the study, researchers looked at 1,231 patients of the vascular prevention clinics at London Health Sciences Centre's University Hospital, with a mean age of 61.5. Each patient had already experienced a small stroke or had high blood pressure, hypertension or a family history of cardiovascular disease. Spence says researchers chose to use patients with a higher likelihood of cardiovascular issues because it would have been harder to get visible results using the general population with a lower risk.
Patients were asked to fill out questionnaires about their diet, lifestyle and medications, including how much they smoked and the number of egg yolks they ate. An ultrasound was performed to examine their plaque buildup. Researchers took into account sex, cholesterol, blood pressure, smoking, body mass index and diabetes.
In addition to relying completely on the recollection of patients as to what they ate, the study did not account for waist circumference and it did not account for a patient's exercise program. And perhaps most notably, it only looked at patients with existing cardiovascular issues.
It's amazing that such a clearly flawed study is even being reported on.