Suggestive linkage detected for blood pressure related traits on 2q and 22q in the population on the Samoan islands

Table 2 Heritability estimates, variance and summary of significant covariates for each trait.

Trait	American Samoa				Samoa				Combined sample				Covariates^d
	N^a	h² ± s.e.^b		Variance^c	N^a	h² ± s.e.^b		Variance^c	N^a	h² ± s.e.^b		Variance^c
SBP	593	0.26	± 0.08	30%	669	0.25	± 0.08	19%	1262	0.25	± 0.06	24%	A, S, A*S, B
DBP	523	0.15	± 0.09	25%	544	0.08	*	25%	1067	0.12	± 0.06	25%	A, S, A², A² *S, B, C, D
PP	595	0.00	*	12%	663	0.19	± 0.08	11%	1258	0.11	± 0.05	11%	A*S, A²
HT	559	0.27	± 0.15	15%	559	0.29	± 0.16	16%	1118	0.27	± 0.10	15%	A, S, B, C

^a Number of individuals. ^b Heritability estimates (h²) and standard error (s.e.). ^c Variance explained by included covariates. For the dichotomous trait, HT, the Kullback-Leibler R² is given. ^d Covariates included in polygenic model: A = age, A² = age², S = sex, A*S = age*sex, A² *S = age² *sex, C = cigarette smoker, D = drinking alcohol and B = body mass index. * Heritability estimate is not significantly different from zero.

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