Table 3.

Regression and Hierarchial Linear Modeling Results with Prenatal Complications, Temperament and Male Co-twin as Predictors

PANEL A	B	S.E.	p	PANEL B	Estimate	S.E.	p	PANEL C	Estimate	S.E.	p
Auditory SOR			R2 = 0.13	Auditory SOR				Auditory SOR
Age	0.04	0.01	.001	Level 1				Level 1
Socioeconomic Status	−0.09	0.04	.031	Negative Affect	0.21	0.04	≤ .001	Negative Affect	0.15	0.06	.01
Negative Affect	0.15	0.04	≤ .001	Fear	0.24	0.03	≤ .001	Fear	0.16	0.06	.01
Fear	0.16	0.04	≤ .001	Level 2				Level 2
Prenatal Complications	0.21	0.43	.62	Age	0.02	0.01	.09	Age	0.03	0.02	.07
				Socioeconomic Status	−0.07	0.03	.028	Socioeconomic Status	−0.12	0.06	.05
				Female v. male co-twin	0.02	0.03	.41	Prenatal Complications	0.77	0.78	.32
Tactile SOR			R2 = 0.09	Tactile SOR				Tactile SOR
Age	0.02	0.01	.11	Level 1				Level 1
Socioeconomic Status	−0.13	0.04	.004	Negative Affect	0.11	0.04	.003	Negative Affect	0.17	0.07	.02
Negative Affect	0.11	0.04	.009	Fear	0.18	0.03	≤ .001	Fear	0.14	0.08	.06
Fear	0.13	0.04	.003	Level 2				Level 2
Prenatal Complications	0.92	0.46	.045	Age	0.01	0.01	.26	Age	0.00	0.02	.99
				Socioeconomic Status	−0.09	0.03	.01	Socioeconomic Status	−0.15	0.06	.01
				Female v. male co-twin	0.17	0.06	.01	Prenatal complications	1.69	0.59	.01

Notes: N = 371 individual twins for Panel A, which represents basic linear regression for participants with birth record data. N = 488 individual twins for Panel B, which includes only female dizygotic twins drawn from the full sample. Female vs. male co-twin is coded as female twin = 0, male twin = 1. For Panel C, N = 125 individual twins, as it uses the same sample as panel A, with the exception that opposite sex twins are excluded.