As hypothesized, the mean LOR for PAE was significantly greater than the mean LOR for COA (p=0.01; Table 3A; Figure 3). Similarly, the mean LOR for PAE was significantly higher for all comparisons to the other parent of interest: PAE vs mother AD (p<0.05), PAE vs father AD (p<0.04), and PAE vs unknown parent AD (p<0.04). Conversely, the LOR based on the mother being AD was not significantly greater than the LOR based on the father being AD (p≥0.10).