. Author manuscript; available in PMC: 2014 Jun 4.

Published in final edited form as: J Abnorm Psychol. 2009 Aug;118(3):576–586. doi: 10.1037/a0016314

Table 1. Means, Standard Deviations and Intraclass Correlations for Disordered Eating.

Subscale	Females								Males								Opposite-sex twins

	All		MZ			DZ			All		MZ			DZ				Female		Male

	M	SD	r	M	SD	r	M	SD	M	SD	r	M	SD	r	M	SD	r^¥	M	SD	M	SD
Drive for Thinness^a	2.13	3.90	0.61^**	2.00	4.00	0.32^**	2.36	4.01	0.36	1.40	0.30^**	0.31	1.43	0.23^**	2.24	4.00	0.12^*	5.90	6.5	0.34	1.34
Bulimia	0.54	1.51	0.30^**	0.50	1.40	0.23^**	0.51	1.12	0.49	1.27	0.33^**	0.43	1.2	0.15	0.44	1.15	0.14^*	0.62	2.00	0.55	1.34
Body Dissatisfaction^a	5.74	6.20	0.64^**	5.04^b	5.90	0.35^**	6.24	6.21	2.20	3.60	0.45^**	1.93	3.30	0.28^**	2.24	4.00	0.10	5.90	6.50	2.44	3.67

Note. The means and standard deviations are for unstandardized scores. Drive for Thinness includes question dropped from twin analyses due to low loading on factor. MZ = monozygotic; DZ = dizygotic; r^¥ = intraclass correlation between male and female of opposite-sex twin pair.

Significant mean difference between males and females on subscale.

Significant mean difference between MZ and DZ twins.

p < .05.

^**

p < .01.