. 2017 Jul 24;20(15):2754–2765. doi: 10.1017/S1368980017001616

Table 7.

Family aggregation of serum 25-hydroxyvitamin D (25(OH)D) in eight Mesoamerican countries, 2011–2013

	Mothers, fathers, and children		Mothers and fathers		Mothers and children		Fathers and children
Correlation, r ^* (95 % CI)	–		0·23	0·10, 0·35	0·49	0·38, 0·58	0·24	0·11, 0·36
Intraclass correlation^†
Within-family variance	282·8		345·0		215·7		285·3
Between-family variance	127·1		101·7		191·6		87·6
ICC^‡ (95 % CI)	0·31	0·23, 0·40	0·23	0·13, 0·37	0·47	0·37, 0·57	0·23	0·13, 0·38

Pearson correlation coefficient.

^†

Variance partitioned from a linear random-effects model with serum 25(OH)D as the continuous outcome and a random effect for family. Separate models were fitted to partition the variance for each combination of two family members.

^‡

Intraclass correlation coefficient (ICC)= Inline graphic . 95 % CI were calculated using the delta method⁽ ¹⁷ ⁾.