Bivariate GCTA estimates of the genetic and residual correlations for bone mineral density measurements at the total-body less head, lower limb, upper limb and skull for the ALSPAC cohort.

<p>TBLH-BMD = total body less head BMD, (LL-BMD) = lower limb BMD, (UL-BMD) = upper limb BMD, (SK-BMD) = skull BMD, r<sub>g</sub> = genetic correlation between trait 1 and trait 2. r<sub>e</sub> = residual correlation between trait 1 and trait 2. All traits, excluding SK-BMD were adjusted for age, gender and weight. SK-BMD was adjusted for age, gender and height. <i>P</i>-refers to the <i>P</i>-value for the likelihood ratio test of whether r<sub>g</sub> = 0. Phenotypic correlations (r<sub>p)</sub> were as follows: SK-BMD/TBLH-BMD (r<sub>p</sub> = 0.40, SE = 0.013, P<0.001), SK-BMD/LL-BMD (r<sub>p</sub> = 0.31, SE = 0.013, P<0.001), SK-BMD/UL-BMD (r<sub>p</sub> = 0.40, SE = 0.013, P<0.001) and LL-BMD/UL-BMD (r<sub>p</sub> = 0.64, SE = 0.010, P<0.001).</p>