Table 6 Heritability of IDF and ATP metabolic syndrome definitions and its log normal transformed individual components in Erasmus Rucphen Family population

Parameter	h² (%)*	SEM	p Value†	S (%)‡	SEM	p Value†
n	2488	SEM	p Value†	S (%)‡	SEM	p Value†
IDF	10.6	5.3	0.01	9.05	6.2	0.07
ATPIII	13.2	6.0	0.07	15.89	7.4	<0.05
ln WC	37.8	4.6	<10⁻⁶	5.6	3.4	<0.05
ln FPG	22.7	4.7	<10⁻⁶	9.6	3.6	<0.01
ln SBP	25.4	4.3	<10⁻⁶	7.8	3.3	<0.01
ln DBP	21.9	4.6	<10⁻⁶	2.7	3.3	0.20
ln HDL-C	42.9	4.1	<10⁻⁶	0.0	–	–
ln TG	28.3	4.4	<10⁻⁶	4.1	3.3	0.10

ATPIII, National Cholesterol Education program Adult Panel III; DBP, diastolic blood pressure; FPG, fasting plasma glucose; HDL-C, high density lipoprotein cholesterol; IDF, International Diabetes Federation; SBP, systolic blood pressure; TG, triglyceride; WC, waist circumference.
*Heritability based on polygenic household model with consideration of the sibship effect (S), covariates: gender, age and inbreeding coefficient. †p values were derived using the likelihood ratio test. ‡S (%) sibship effect.