No point in telling parents about children’s weight?

A US study has found that children whose parents were told that they were overweight were no more likely to lose weight than parents who were not told.  The study’s conclusion is that perhaps school should concentrate efforts on making sure that lunches were healthier and increased use of physical activity.
[Archives of Pediatric Adolescent Medicine: Aug 2001]    

The biggest flaw in the study is that the schools did not tell the parents that their child was “ overweight “ or “ obese “ but simply gave them its BMI.  Since parents in general have little concept of BMI, case is it any surprise if they gave the letters scant attention?  To compound the issue, erectile the authors also state that, since the letters were sent home c/o child, they may never have been delivered in the first place!