. Author manuscript; available in PMC: 2011 Dec 1.

Published in final edited form as: Int J Eat Disord. 2010 Dec;43(8):679–688. doi: 10.1002/eat.20772

Table 2. Internal Consistency and Descriptive Statistics for Weight and Shape Concerns by Twin Registry and Age Group.

Sample	Alphas	Means (SD)	Score Range
Registry:
MSUTR	.94	1.70 (1.50)	.00-5.80
MTFS	.95	1.42 (1.43)	.00-6.00
ATR	.94	1.89 (1.52)	.00-6.00
Age Group:
10-12 years	.92	1.19 (1.31)^a	.00-4.60
13-15 years	.95	1.22 (1.39)^a	.00-6.00
16-19 years	.95	1.78 (1.63)^b	.00-5.75
20-25 years	.95	1.89 (1.51)^b	.00-6.00
26-30 years	.94	1.95 (1.45)^b	.00-5.80
31-41 years	.94	1.99 (1.51)^b	.00-6.00

Note. MSUTR = Michigan State University Twin Registry; MTFS = Minnesota Twin Family Study; ATR = Australian Twin Registry. Means with different superscripts are significantly different from each other at p < .05.

^***

p < .001