Table 3 Mean (± SE) of the estimate of the heritability of the average and slope of the trait for year-of-exam- and age-matched data.

0.25 ± 0.03

0.44 ± 0.03

-0.01 ± 0.03

-0.10 ± 0.06

0.38 ± 0.05

0.49 ± 0.06

0.07 ± 0.05

0.28 ± 0.18

0.73 ± 0.05

0.76 ± 0.06

0.09 ± 0.08

0.15 ± 0.18

0.44 ± 0.06

0.56 ± 0.05

0.06 ± 0.05

0.07 ± 0.08

-^A

0.51 ± 0.04

-

0.06 ± 0.07

0.08 ± 0.02

0.17 ± 0.04

0.01 ± 0.02

0.07 ± 0.08