Table 1.
Summary statistics for contemporary groups by genetic supplier
| GS (n) | MH | CH | CG (average ) | PRRS Vx | Days (standard deviation) |
|---|---|---|---|---|---|
| 1 (381) | 1 | 1 | 3 (33.0) | Yes | 88 (13.5) |
| 2 | 2 | 6 (20.2) | Yes | n/a | |
| 3 | 3 | 4 (33.5) | Yes | 72 (5.7) | |
| 4 | 5 (22.0) | Yes | 73.7 (3.8) | ||
| 2 (277) | 4 | 5 | 9 (13.3) | Yes | 58 (21.8) |
| 5 | 6 | 4 (20.8) | No | 29 (2.6) | |
| 6 | 7 | 5 (18.0) | Yes | 30.8 (2.8) | |
| 8 | 4 (11.8) | Yes | 32.8 (3.1) | ||
| 3 (425) | 7 | 9 | 3 (40.0) | Yes | 35 (3.5) |
| 8 | 10 | 9 (46.3) | Yes | 37.7 (4.2) | |
| 4 (368) | 9 | 11 | 5 (18.4) | No | 32.5 (2.4) |
| 10 | 12 | 4 (33.3) | Yes | 38 (3.6) | |
| 13 | 5 (30.0) | No | 33.4 (3.0) | ||
| 5 (367) | 11 | 14 | 5 (26.2) | Yes | 36.6 (1.1) |
| 12 | 15 | 4 (24.3) | No | 49.7 (7.6) | |
| 13 | 16 | 3 (33.7) | Yes | 32 (5.3) | |
| 17 | 4 (30.0) | Yes | 33.7 (3.5) | ||
| 6 (333) | 14 | 18 | 7 (24.9) | Yes | 29.9 (2.5) |
| 19 | 2 (25.0) | Yes | 32.5 (2.1) | ||
| 15 | 20 | 3 (25.0) | Yes | 35 (0) | |
| 21 | 3 (24.7) | Yes | 32.3 (3.0) | ||
| 7 (204) | 16 | 22 | 4 (37.8) | No | 41.5 (11) |
| 17 | 23 | 4 (39.8) | Yes | 34 (5.8) |
Genetic supplier (GS; number of gilts within parenthesis), multiplier herd (MH), commercial herd (CH), number of contemporary groups (CG) and average number of gilts (average ) per CG, use of vaccination for PRRS (PRRS Vx), and average days from introduction to blood sampling after acclimation (days) by CG