Table 1. Number of individuals per cohort, and size of the complete pedigree for each three-year cohort of affected (A) or control (C) racehorses used to determine the marginal ancestral contributions to each.
| Cohort | Size of cohort | Size of pedigree | Cohort | Size of cohort | Size of pedigree |
|---|---|---|---|---|---|
| A93/95 | 32 | 1,783 | C93/95 | 160 | 3,887 |
| A94/96 | 37 | 1,873 | C94/96 | 185 | 4,072 |
| A95/97 | 41 | 2,011 | C95/97 | 205 | 4,389 |
| A96/98 | 48 | 2,081 | C96/98 | 240 | 4,912 |
| A97/99 | 38 | 1,881 | C97/99 | 190 | 4,403 |
| A98/00 | 32 | 1,707 | C98/00 | 160 | 4,210 |
| A99/01 | 24 | 1,561 | C99/01 | 120 | 3,560 |
| A00/02 | 35 | 1,836 | C00/02 | 175 | 4,285 |
| A01/03 | 46 | 2,046 | C01/03 | 230 | 4,821 |
| A02/04 | 45 | 1,980 | C02/04 | 225 | 4,861 |
| A03/05 | 39 | 1,830 | C03/05 | 195 | 4,463 |
| A04/06 | 27 | 1,695 | C04/06 | 135 | 4,019 |
| A05/07 | 19 | 1,633 | C05/07 | 95 | 3,444 |