Table 4

Standardised parameter estimates and 95% confidence intervals of the best fitting AE model of univariate analysis of pupil size for right and left eyes

 Eye h2 95% CI e2 95% CI Age 95% CI Right 0.78 0.73–0.82 0.19 0.15–0.23 0.03 0.008–0.06 Left 0.80 0.75–0.84 0.18 0.15–0.23 0.02 0.004–0.05
• h2 = proportion of variance due to additive genes, e2 = proportion of variance due to individual environmental effects, age = proportion of variance due to age effect, 95% CI = 95% confidence interval.