Table 3. Heritability Estimates for Continuous BMI-related Traits.

		Using Whole Population					Excluding related >0.025
Phenotype		n analyzed	Estimate of h2 (a)	se	Estimate of hg 2 (b)	se	n analyzed	Estimate of hg 2 (c)	se
BMI		5,343	0.833	0.056	0.619	0.047	2,125	0.466	0.165
	Male	2,590	1.000	0.076	0.792	0.077	751	0.943	0.462
	Female	2,753	0.653	0.141	0.588	0.097	1,374	0.602	0.259
Height		5,344	0.634	0.064	0.460	0.050	2,125	0.352	0.173
	Male	2,590	1.000	0.059	0.901	0.071	751	0.786	0.459
	Female	2,754	0.917	0.136	0.541	0.103	1,374	0.428	0.268
Change in BMI		4,983	0.142	0.077	0.141	0.053	1,981	0.042	0.176
	Male	2,340	0.312	0.114	0.263	0.091	666	0.169	0.483
	Female	2,643	0.149	0.159	0.086	0.102	1,315	0.000	0.265

se: standard error

(a) estimate of the full narrow sense heritability, calculated using GCTA, but replacing the full related matrix with a modified one that assumes zero relatedness between participants whose estimated relatedness is less than 0.05

(b) estimate of the amount of variance in the trait that was explained by the interrogated SNVs in a linear model, using the relatedness matrix calculated by GCTA, and using all participants

(c) estimate of the amount of variance in the trait that was explained by the interrogated SNVs in a linear model, using the relatedness matrix calculated by GCTA, and including only one participant of any pair where the estimated kinship coefficient was larger than 0.025 (2nd-3rd cousins).