Parameter

Estimate ± SE


Regression coefficients
 
Intercept
 
α_{m}

0.0000^{a}

α_{f}

0.0633 ± 0.0294

Age effect
 
β1_{m}

0.0519 ± 0.0011

β1_{f}

0.0519^{b}

Stature effect
 
β2_{m}

[0]

β2_{f}

[0]

Body weight effect
 
β3_{m}

[0]

β3_{f}

[0]

Variance components
 
V_{AD}

0.0654 ± 0.0208 (24.43%)

V_{SP}

0.0355 ± 0.0176 (13.26%)

V_{HS}

[0]

V_{SB}

[0]

V_{RS}

0.1668 ± 0.0219 (62.31%)

LRT
^{c}
 
χ^{2}

9.88

df

7

P

0.84

 Parameter estimates and corresponding asymptotic standard errors (SEs) are provided for the best fitting and most parsimonious genetic model. [ ] Parameter was fixed at the indicated value. α_{m} and α_{f} are sexspecific intercepts (m, males; f, females). β_{m} and β_{f} are sexspecific slopes. ^{a}Parameter estimate reached the boundary. ^{b}Parameter was fixed to be equal to the previous. ^{c}LRT for comparison of the most parsimonious and general model where all parameters were estimated. df, degrees of freedom; FS1OA, first factor score obtained from principal component analysis of OA; LRT, likelihood ratio test; V, variation, due to additive genetic effect (V_{AD}) or to common environment shared by parents (V_{SP}), by siblings (V_{SB}), or by all members of nuclear pedigrees/household (V_{HS}).