To the Editor: The study by Dr Dansinger and
colleagues1 suggests that all 4 diets (Atkins,
Ornish, Weight Watchers, and Zone) are comparable because the changes in risk
factors for coronary heart disease (CHD) are similar. I believe that this
would not be a proper conclusion because the study did not distinguish between
cardiovascular risk factors and direct measures of cardiovascular disease.
Ornish D. Comparison of Diets for Weight Loss and Heart Disease Risk Reduction. JAMA. 2005;293(13):1589-1591. doi:10.1001/jama.293.13.1589