I read the summary as well, and could already see the obvious flaws and biases in the study's design...and I'm not even a doctor! Even the way it reports its findings is misleading: Rather than saying the improvements failed to reach statistical significance except in one subgroup, it tries to paint the results in a more positive light by stating that the "diet modestly lowered HbA1c but to a clinically significant extent in participants with raised blood pressure." This study is one of the most blatantly biased I have ever read.
Canola Oil Linked to Improved Glucose Control in Type 2 Diabetes — Physician’s First Watch
Canola Oil Linked to Improved Glucose Control in Type 2 Diabetes
By Kelly Young
A low glycemic-load diet supplemented with canola oil is associated with slight improvements in glycemic control in type 2 diabetes, compared with a diet emphasizing whole grain. The industry-funded study was published in Diabetes Care and was presented at the American Diabetes Association's annual conference.
Roughly 140 patients with type 2 diabetes were randomized to receive either the intervention diet (4.5 slices of canola oil-enriched whole wheat bread daily plus advice to consume foods low on the glycemic index) or the control diet (7.5 slices of whole-wheat bread without canola oil plus advice to replace white-flour foods with whole grains).
Over 12 weeks, the intervention diet was associated with a modest reduction in HbA1c relative to the control diet (–.47% vs. –.31% HbA1c units). Patients with elevated systolic blood pressure saw the biggest gains. Patients consuming the intervention diet also had greater improvements on their Framingham risk scores.
Reader Comments (4)
Agree with Dr. Simpler. Shameful.
Completely agree with Dr. Simpler's comment!
Why would any respectable journal even publish this kind of manipulative study. Even your summary reveals gross error in the study design by NOT controlling for carb intake - 4 slices of bread compared to 7.5 slices of bread and otherwise giving different dietary advice to the two groups. There is no logical way to conclude that the canola oil had anything to do with the results.