. Author manuscript; available in PMC: 2014 Dec 1.

Published in final edited form as: J Speech Lang Hear Res. 2014 Jun 1;57(3):850–864. doi: 10.1044/2013_JSLHR-L-12-0240

Table 6. Univariate DeFries-Fulker extremes analysis for LI at 4 years: Transient versus persistent LI.

Classification	N		Transformed co-twin mean		h²_g (95% CI)	c²_g (95% CI)	e ² _g
Classification	MZ	DZ	MZ	DZ	h²_g (95% CI)	c²_g (95% CI)	e ² _g
Transient LI	167	88	.85	.66	.38 [0.12, 0.65]	.47 [0.20, 0.78]	.15
Persistent LI	60	28	.95	.75	.40 [0.11, 0.67]	.55 [0.33, 0.89]	.05

Note. h²_g - group heritability; c²_g - group environmentality; e²_g - group nonshared environmentality.