Table 3 Meta-analysis of full-sib IBD regression results for height, body mass index (BMI) and educational attainment (EA).

Trait	Study	N.pair	\(\hat r_{FS}^{\mathrm{a}}\)	s.e.	\(\hat c_{FS}^2\)	s.e.	\(\hat h_{FS}^2\)	s.e.
Height	This paper	19,954	0.53	0.01	0.23	0.06	0.60	0.12
	Young et al.¹²	64,847	0.41	0.01	0.07	0.05	0.68	0.10
	Hemani et al.²²	20,240	0.43	0.01	0.08	0.07	0.69	0.14
	Meta-analysis	105,041	0.44	<0.01	0.12	0.03	0.66	0.07
BMI	This paper	19,885	0.27	0.01	−0.13	0.08	0.81	0.17
	Young et al.¹²	56,461	0.27	0.01	0.08	0.06	0.39	0.12
	Hemani et al.²²	20,240	0.31	0.01	0.10	0.08	0.42	0.17
	Meta-analysis	96,586	0.28	<0.01	0.03	0.04	0.50	0.08
EA	This paper	19,736	0.29	0.01	0.22	0.08	0.14	0.16
	Young et al.¹²	32,542	0.36	0.01	0.16	0.07	0.40	0.15
	Meta-analysis	52,278	0.34	<0.01	0.19	0.06	0.28	0.11

Shown is the number of sib-pairs (N.pair) in each study, inferred full-sib correlation \((\hat r_{FS})\), common environmental effect (\(\hat c_{FS}^2\)) and heritability (\(\hat h_{FS}^2\)) with standard errors (s.e.).
^ain each study, we calculated the full-sib correlation from the given estimates of common environmental and genetic effects from full-sib regression as \(\hat c_{FS}^2 + \frac{1}{2}\hat h_{FS}^2\). Standard errors were estimated using the approximation \(\sqrt {(1 - \hat r_{FS}^2)/N}\), where N is the number of pairs.

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