Body dissatisfaction and drive for thinness in young adult twins
Article first published online: 8 APR 2005
Copyright © 2005 Wiley Periodicals, Inc.
International Journal of Eating Disorders
Volume 37, Issue 3, pages 188–199, April 2005
How to Cite
Keski-Rahkonen, A., Bulik, C. M., Neale, B. M., Rose, R. J., Rissanen, A. and Kaprio, J. (2005), Body dissatisfaction and drive for thinness in young adult twins. Int. J. Eat. Disord., 37: 188–199. doi: 10.1002/eat.20138
- Issue published online: 8 APR 2005
- Article first published online: 8 APR 2005
- Manuscript Accepted: 23 MAR 2004
- body dissatisfaction;
- drive for thinness;
- twin study;
- gender differences
We explored correlates of the Eating Disorder Inventory subscales Body Dissatisfaction (BD) and Drive for Thinness (DT) and genetic and environmental influences on these traits.
In a population-based sample of 4,667 Finnish twins aged 22–27 years, we conducted twin modeling to explore genetic and environmental contributions to body dissatisfaction and drive for thinness. Logistic regression was used for the correlational analysis.
Various eating and body size-related factors and psychosomatic symptoms were significantly associated with high body dissatisfaction and drive for thinness in both genders. In women, early puberty onset, early initiation of sexual activity, and multiple sex partners were statistically significant risk factors of body dissatisfaction. In gender-specific univariate twin models, additive genes accounted for 59.4% (95% confidence interval [CI] = 53.2–64.7%) of the variance in body dissatisfaction and for 51.0% (95% CI = 43.7–57.5%) of the variance in drive for thinness among females, but for none of the variance among males.
There are very distinct gender differences in the heritability patterns of body dissatisfaction and drive for thinness in young adults. © 2005 by Wiley Periodicals, Inc.