Table 2:

Bivariate Cholesky Decomposition Model-Fitting Results for Girls^a,b

		Inattention & Overweight/Obesity (Girls)
Model		Model Fit			Comparative Fit
Number	Model	−2LL	df	AIC	Δχ2	Δdf	p-value
1	ACE-ACE rg, rc, re	1138.148	1415	−1691.852	---	---	---
2	AE-AE rg, re	1142.201	1418	−1693.799	4.053	3	.256
3	CE-CE rc, re	1154.947	1418	−1681.053	16.799	3	.001
4	E-E re	1272.188	1421	−1569.812	134.040	6	<.0001
		Hyperactivity/Impulsivity & Overweight/Obesity (Girls)
Model		Model Fit			Comparative Fit
Number	Model	−2LL	df	AIC	Δχ2	Δdf	p-value
1	ACE-ACE rg, rc, re	987.380	1418	−1848.620	---	---	---
2	AE-AE rg, re	987.689	1421	−1854.311	.309	3	.958
3	CE-CE rc, re	1006.304	1421	−1835.696	18.924	3	<.0001
4	E-E re	1115.017	1424	−1732.983	127.637	6	<.0001

^aA = additive genetic effects; C = common environmental effects; E = unique environmental effects; r_g = correlation between presence of ADHD symptoms and overweight/obesity that is due to additive genetic influences; r_c = correlation between presence of ADHD symptoms and overweight/obesity that is due to common environmental influences; r_e = correlation between presence of ADHD symptoms and overweight/obesity that is due to unique environmental influences; −2LL = −2 x log likelihood; AIC = Akaike’s Information Criterion; Δχ² = chi-square difference test statistic.

^bStatistics for the best-fitting model appear in bold.