The average international runway model has a body mass index (BMI) under 16--low enough to indicate starvation by the World Health Organization's standard. And Record and Austin are worried not just about the models themselves, but about the vast number of girls and women their images influence. "Especially girls and teens," says Record. "Seventy percent of girls aged 10 to 18 report that they define perfect body image based on what they see in magazines. " That's especially worrying, she says, given that anorexia ( 厌食症) results in more deaths than does any other mental illness, according to the National Institute of Mental Health. 53. Why are Record and Austin especially worried about the low body mass index of models?