. 2019 Jan 28;40:710–716. doi: 10.1016/j.ebiom.2019.01.040

Table 3.

Proportions of variance explained by genetic (a [2]) and non-shared environmental (e [2]) factors for the Horvath and Levine clocks at time 1 and time 2 in the pooled sample of SATSA and LSADT. The genetic and environmental correlations, rA and rE, indicate the extent of overlap in A and E between time 1 and time 2.

		a²	e²	Cross-time a²	Cross-time e²	rA	rE
Horvath clock	Baseline	0·55 (0·34, 0·76)	0·45 (0·24, 0·66)	0·78 (0·51, 1·05)	0·22 (−0·05, 0·49)	0·77 (0·52, 1·03)	0·25 (−0·02, 0·52)
Horvath clock	Follow-up	0·51 (0·30, 0·71)	0·49 (0·29, 0·70)	0·78 (0·51, 1·05)	0·22 (−0·05, 0·49)	0·77 (0·52, 1·03)	0·25 (−0·02, 0·52)
Levine clock	Baseline	0·34 (0·04, 0·65)	0·66 (0·35, 0·97)	1·02 (0·50, 1·54)	−0·02 (−0·54, 0·50)	0·98 (0·45, 1·51)	−0·01 (−0·31, 0·29)
Levine clock	Follow-up	0·41 (0·17, 0·65)	0·59 (0·36, 0·83)	1·02 (0·50, 1·54)	−0·02 (−0·54, 0·50)	0·98 (0·45, 1·51)	−0·01 (−0·31, 0·29)

Note. Numbers in parentheses indicate 95% confidence intervals. The analyses were adjusted for sex (0 = male, 1 = female), current smoking status (0 = no, 1 = yes), cohort effects (birth year) and country (0 = Sweden,1 = Denmark).