Table 1.
Number of observations (N), mean and standard deviation of variables in the entire sow data set
| Variables | N | Mean | SD |
|---|---|---|---|
| Sow | |||
| Parity | 1058 | 3.0 | 1.6 |
| Service weight (kg) | 513 | 174.4 | 30.9 |
| Farrowing weight (kg) | 1040 | 246.9 | 34.2 |
| Weaning weight (kg) | 1032 | 214.0 | 36.6 |
| Service back-fat (mm) | 344 | 14.2 | 4.1 |
| Farrowing back-fat (mm) | 870 | 15.8 | 4.4 |
| Weaning back-fat (mm) | 741 | 13.1 | 3.5 |
| Gestation days | 1055 | 114.7 | 1.5 |
| Lactation days | 1058 | 27.7 | 2.8 |
| Litter | |||
| Total litter size | 1058 | 12.9 | 3.4 |
| Litter live-weight (kg) | 1057 | 17.7 | 4.5 |
| Number born alive | 1058 | 11.8 | 3.3 |
| Number born dead | 1058 | 1.0 | 1.4 |
| Pre-wean mortality (%) | 1056 | 11.2 | 12.1 |
| Number weaned | 1056 | 10.2 | 2.2 |
| Piglet | |||
| Birth weight (kg) | 13 228 | 1.5 | 0.4 |
| Weaning weight (kg) | 10 685 | 7.8 | 1.9 |