Figure 2 | Hypertension Research

Figure 2

From: Urinary norepinephrine and epinephrine excretion rates are heritable, but not associated with office and ambulatory blood pressure

Figure 2

Path diagram for a bivariate model. For clarity only one twin is depicted. A1, A2=Genetic variance components; C1, C2=common environmental variance components; E1, E2=unique environmental variance components; a11 through a22=genetic path coefficients (or factor loadings) of which a22 represents specific genetic influences on UNEV; c11 through c22=common environmental path coefficients (or factor loadings) of which c22 represents specific common environmental influences on UNEV; e11 through e22=unique environmental path coefficients (or factor loadings) of which e22 represents specific unique environmental influences on UNEV. Formula for the different heritability estimates are as follows:

Back to article page