Standardized path coefficients and their 95% confidence intervals (CI) for all parameters in the CU→PGD causal model are shown in Table 3. Although we have retained all parameters in the model, the 95% CIs for the additive genetic and shared environmental pathways from PGD span zero at all ages. The same table also includes the CU→PGD causal parameters which are large, significant and range from 0.60 to 0.67.
