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Table 5 Estimates of additive and dominance genetic and common and unique environmental variance–covariance matrices (Σ), based on fitting an ADCE model to the trivariate twin data, conditional on age and sex

From: Genetically Informed Regression Analysis: Application to Aggression Prediction by Inattention and Hyperactivity in Children and Adults

Child ΣA ΣD ΣC ΣE
  Agg InA HA Agg InA HA Agg InA HA Agg InA HA
Agg 16.20 1 1 1.86 1 1 4.50 0.258 0.392
InA 6.66 2.77 1 8.84 0.526 0.66 0.23 1 1.28 4.21 0.422
HA 7.00 2.89 3.02 3.28 4.40 0.44 0.16 0.10 1.17 1.22 1.98
  h2 d2 c2 e2
  0.717 0.172 0.382 0.550 0.462 0.082 0.014 0.011 0.199 0.262 0.208
Adult ΣA ΣD ΣE
  Agg InA HA Agg InA HA Agg InA HA
Agg 2.36 0.584 0.814 2.94 0.546 0.814 5.95 0.281 0.224
InA 1.88 4.36 0.831 1.24 1.76  − 0.041 1.91 7.69 0.402
HA 0.08 2.52 2.52 2.10  − 0.08 2.26 1.50 3.05 7.49
  h2 d2 e2
  0.209 0.315 0.117 0.260 0.127 0.190 0.528 0.556 0.631
  1. The lower triangles give (co)variances, and the upper triangle correlations. The last row (for children and for adults) contains the standardized variance components (h2 is heritability; d2, c2 and e2 give the proportions of variance explained by D, C and E)