Table 1 Cross-sectional analyses: heritabilities and covariate effects for three traits within age-classes from univariate quantitative genetic analyses of data from Framingham Heart Study subjects measured in the 4^th and 6^th decades of life.

30-39 Years

   Total Cholesterol

0.34

0.06

984

<0.001

<0.001

-^B

   Systolic Blood Pressure

0.10

0.15

994

<0.01

<0.05

<0.001

   Body Weight

0.48

0.49

1239

<0.001

<0.01

<0.001

-

50-59 Years

   Total Cholesterol

0.29

0.02

818

<0.001

<0.10

-

   Systolic Blood Pressure

0.32

0.04

968

<0.001

<0.05

<0.001

   Body Weight

0.45

0.26

881

<0.001

<0.001

<0.001

-