Genetic confounding in the association of early motor development with childhood and adolescent exercise behavior

Table 5 Genetic, and shared and unique environmental correlations between early motor development and later exercise behavior

	MD-FS	GM5	MET7	MET10	MET12	MET14
1. Number of complete twin pairs
MD-FS	—	4567	897	903	1908	1293
GM5	4516	—	855	883	1998	1326
MET7	1001	937	—	277	321	235
MET10	1054	998	399	—	486	254
MET12	1968	2044	375	577	—	1069
MET14	941	973	200	178	872	—
2. Genetic correlations
MD-FS	—	0.32*	−0.10	−0.15	−0.04	−0.14
GM5	0.27*	—	−0.15	−0.20	−0.10	−0.04
MET7	−0.01	−0.17*	—	0.88*	0.38	0.97*
MET10	−0.15*	−0.20*	0.18	—	0.77*	0.94*
MET12	−0.06	−0.24*	0.36*	0.97*	—	0.55*
MET14	−0.23*	−0.24*	0.12	0.52*	0.61*	—
3. Shared environmental correlations
MD-FS	—	0.05	−0.03	−0.03	−0.07	−0.03
GM5	0.16*	—	−0.10	−0.08	−0.14	−0.29
MET7	−0.10	−0.14	—	0.52*	0.36*	0.12
MET10	−0.07	−0.17	0.54*	—	0.48*	0.40*
MET12	−0.10	−0.04	0.54*	0.40*	—	0.61*
MET14	0.00	0.00	0.82*	0.27	0.49*	—
4. Unique environmental correlations
MD-FS	—	0.31*	−0.05	−0.02	−0.10	−0.12
GM5	0.33*	—	−0.04	−0.05	−0.03	−0.05
MET7	−0.13*	−0.10*	—	0.11	0.15*	0.08
MET10	−0.08	−0.10	0.46*	—	0.22*	0.00
MET12	−0.08*	−0.05	0.10	0.06	—	0.40*
MET14	−0.07	0.00	0.03	0.06	0.24*	—

Note Genetic, shared environmental and unique environmental correlations extracted from the ACE Cholesky model. First panel shows the number of complete twin pairs on which the correlations were based; male N below the diagonal and female N above the diagonal. Panel two shows the male genetic correlations below the diagonal and the female genetic correlations above the diagonal. Panel three shows the male shared environmental correlations below the diagonal and the female shared environmental correlations above the diagonal. Panel four shows the male unique environmental correlations below the diagonal and the female unique environmental correlations above the diagonal. MD-FS represents the factor score of motor milestones achievement before age 2; GM5 represents gross motor development at age 5; MET7, MET10, MET12, and MET14 are the exercise behavior at each age (7, 10, 12, and 14 years old).
* p < 0.025

ISSN: 1479-5868