| http://www.w3.org/ns/prov#value | - ting at 13 had an average increase in body mass index (BMI), a measure of weight relative to height, of 24 percent two years later.Both boys and girls who severely restricted their eating at 13 had lower BMIs when they were two years older.The most important message is that even at this young age, a high percentage of boys and girls have worrying eating disorders symptoms, Dr. Nadia Micali said.
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