Table 1.

Proportion of trait variance (standard error) attributable to the additive and dominance effect of genes and the residual variance attributed to the environment among the OOA, Lancaster County PA

			Proportion of Variance
Trait	Number	Mean (SD) mmHg	Additive	Dominance	Environmental
With those on medication removed
SBP	585	121.3 (15.9)	0.14 (0.12)	0.32 (0.28)	0.54 (0.21)
DBP	585	78.3 (9.2)	0.17 (0.12)	0.25 (0.25)	0.59 (0.18)
Adding a constant to those on medication
SBP	616	123.6 (19.1)	0.04 (0.13)	0.96 (0.13)	0.00
DBP	616	79.0 (10.1)	0.16 (0.11)	0.46 (0.27)	0.38 (0.21)
Ignoring medication use
SBP	616	123.1 (18.1)	0.08 (0.12)	0.76 (0.33)	0.17 (0.25)
DBP	616	78.8 (9.8)	0.17 (0.11)	0.37 (0.26)	0.46 (0.20)