NEW YORK - Fathers are important influences on their daughters' perceptions of their weight and shape during childhood, and can increase their risk of developing an eating disorder in adolescence, research shows.

"Fathers have been mostly ignored in previous research on eating disorders," Dr. W. Stewart Agras, who led the research, told Reuters Health. Based on his findings, Agras said fathers "should avoid criticizing their daughter's weight or shape. Rather they should build up their daughter's confidence by emphasizing other positive attributes."

Weight concerns and preoccupation with being thin, together with social pressure to be thin, are strong risk factors for eating disorders in later adolescence. In an effort to throw light on what factors during childhood contribute to weight concerns and thin body preoccupation, Agras and colleagues from Stanford University in California followed 134 children (68 girls and 66 boys) from birth to age 11 and their parents.

Annual questionnaires beginning at age 2 assessed parents' concerns about their children's weight and eating habits as well as their own weight.

The results show, Agras said, that "fathers are important in influencing their daughters toward bulimia, particularly fathers who were overweight and wanted to be thinner." These influences may be direct - such as criticizing the daughter's weight or shape - or indirect, by expressing their own concerns about weight and shape.