Table 3.
Relationships between DRD4 and ancestral diversity
| Harvard study (using the semi-structured ancestry I measure) |
Binghamton study (using a multiple-choice version of ancestry I) |
Binghamton dataset (using a free-response measure (ancestry III) |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 7R– | 7R+ | Total | 7R– | 7R+ | Total | 7R– | 7R+ | Total | ||
| 1 ancestry | Obs. | 63 | 21 | 84 | 102 | 36 | 138 | 93 | 22 | 115 |
| Exp. | 62.8 | 21.2 | 84 | 105.3 | 32.7 | 138 | 87.3 | 27.7 | 115 | |
| >1 ancestry | Obs. | 8 | 3 | 11 | 30 | 5 | 35 | 36 | 19 | 58 |
| Exp. | 8.2 | 2.8 | 11 | 26.7 | 8.3 | 35 | 41.7 | 13.3 | 58 | |
| Total | 71 | 24 | 95 | 132 | 41 | 173 | 132 | 41 | 173 | |
| One-sided Fisher's exact = 0.562 | One-sided Fisher's exact = 0.104 | Pearson's chi-square = 4.83, P = 0.028 | ||||||||