VN: Type 2 Diabetes Mellitus (2024)

Author and Year:
Barnard N, Levin S, et al. 2018
PubMed ID:
Article Title:
Turning the Waiting Room into a Classroom: Weekly Classes Using a Vegan or a Portion-Controlled Eating Plan Improve Diabetes Control in a Randomized Translational Study.
Barnard N, Levin S, Gloede L, Flores R
Journal of the Academy of Nutrition and Dietetics
Year of publication:
Page numbers:
Study Design:
Randomized Controlled Trial
Risk of Bias Assessment Rating:
Low risk
Inclusion Criteria:
Diagnosis of type 2 diabetes mellitus; fasting plasma glucose >/= 126 mg/dL on 2 occasions or prior physicians' diagnosis of type 2 diabetes with use of hypoglycemic medications for at least 6 months hemoglobin A1c between 6.5% and 10.5%; at least 18 years old; ability and willingness to be assigned to either a low-fat, vegan or portion-controlled eating plan; participate in all components of the study; diabetes medications unchanged for 1 month before volunteering for the study.
Exclusion Criteria:
BMI >45; alcohol consumption of more than 2 drinks/day or the equivalent; episodic increased drinking (>2 drinks/day) on weekends; history of alcohol abuse or dependency followed by any current use; use of recreational drugs in the past 6 months; pregnancy; signs or symptoms of acute uncontrolled diabetes including but not limited to polyuria, polydipsia; blurred vision or uncontrolled weight loss; unstable medical status; already following a low-fat, vegetarian eating pattern; lack of English fluency.
Research Purpose:
This clinical trial ascertained the effects of a simple, on-site program of nutrition instruction for individuals with type 2 diabetes, using weekly classes in the office waiting room of a private endocrinology practice in Washington, DC. It used, in randomized fashion, low-fat vegan and portion-controlled eating plans, testing the hypotheses that a vegan intervention would (1) improve glycemic control, body weight, plasma lipid concentrations, blood pressure, and indices of renal function in a within-group analysis during a 20-week intervention, and (2) do so more effectively than an intervention using a portion-controlled eating plan.
Blinding efforts:
Not applicable
Study Location:
United States, Washington DC
Source(s) of Funding:
Please specify names of funders:
Physicians Committee for Responsible Medicine