Table 1 GREML heritability estimates for shared childhood urbanicity, height, BMI and educational attainment

	Number of PCs	Additive heritability (h²)	Standard error	N	h² Controlling for childhood urbanity	Standard error	N
Height	2	0.404	0.067	7488	0.404	0.067	7488
BMI	2	0.098	0.069	7415	0.099	0.069	7415
Education (HGC)	2	0.334	0.066	7550	0.300	0.066	7550
Urbanity in adulthood	2	0.347	0.058	7564	0.306	0.059	7564
Urbanity in childhood	2	0.290	0.059	7564	NA	NA	NA
Height	10	0.389	0.068	7488	0.388	0.068	7488
BMI	10	0.115	0.068	7415	0.116	0.069	7415
Education (HGC)	10	0.319	0.066	7550	0.297	0.067	7550
Urbanity in adulthood	10	0.246	0.062	7564	0.214	0.063	7564
Urbanity in childhood	10	0.211	0.062	7564	NA	NA	NA
Height	20	0.376	0.069	7488	0.374	0.069	7488
BMI	20	0.106	0.069	7415	0.106	0.069	7415
Education (HGC)	20	0.323	0.066	7550	0.302	0.067	7550
Urbanity in adulthood	20	0.243	0.062	7564	0.213	0.063	7564
Urbanity in childhood	20	0.203	0.062	7564	NA	NA	NA

Analysis includes white, non-Hispanic respondents in the Health and Retirement Study (HRS) for cryptic relatedness cutoff of 0.025. Two PCs control for population stratification in first set of analyses (A,B), ten PCs in second set of analyses (C,D) and 20 PCs in third set
BMI body mass index, GREML genetic relatedness estimation through maximum likelihood, PC principal component

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