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. Author manuscript; available in PMC: 2009 Sep 23.

Published in final edited form as: AJS. 2008;114(Suppl):S202–S232. doi: 10.1086/592205

TABLE 2.

Twin Correlations, Variances, and Covariances for MZ and DZ Twin Pairs

	COG1	ED1	AFB1	COG2	ED2	AFB2
MZ twins:
COG1 …	10.94	.36	.12	.53^*	.38^**	.08^**
ED1.....	1.75	2.11	.21	.38	.71^*	.15^**
AFB1 …	2.13	1.67	30.13	.08	.15	.19^*
COG2 …	5.81	1.81	1.45	10.94	.36	.12
ED2.....	1.81	1.51	1.21	1.75	2.11	.21
AFB2 …	1.45	1.21	5.71	2.13	1.67	30.13
DZ twins:
COG1 …	13.58	.41	.15	.18^*	.19^**	.17^**
ED1.....	2.29	2.37	.28	.19	.51^*	.24^**
AFB1 …	2.23	1.81	17.71	.17	.24	.45^*
COG2 …	2.39	1.09	2.63	13.58	.41	.15
ED2.....	1.09	1.20	1.50	2.29	2.37	.28
AFB2 …	2.62	1.50	8.05	2.23	1.81	17.71

Note.—Correlations are above the diagonal, variances on the diagonal, and covariances below.

^*

Important univariate correlation.

^**

Important multivariate correlation.