To the Editor: The study by Dr Dansinger and
colleagues1 provides useful insights into the
relative appeal of 4 popular diets. However, it fails to provide a meaningful
comparison of their efficacy because of high attrition rates and poor adherence,
with the possible exception of those participants reporting the highest adherence.
A mean weight loss of 7% is reported for those participants in the highest
tertile of adherence; it would be helpful if specific results or comparisons
for that subgroup could be provided. In addition, because most of the participants
did not follow the diet as defined, it would be more appropriate to pool the
data to examine the relationships between outcomes of interest and nutrient
intake rather than diet type.
Kelly JH. Comparison of Diets for Weight Loss and Heart Disease Risk Reduction. JAMA. 2005;293(13):1589-1591. doi:10.1001/jama.293.13.1590-a