Table 1 Herd variables assessed by the questionnaire and distribution of the pen samples by the categories of the outcome variable
Number of pen samples by the categories of the outcome variable | Number of pen samples by the categories of the outcome variable | ||||||
|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 1 | 2 | 3 | ||
HERD VARIABLES | |||||||
Type of system | Management of breeding sows | ||||||
Open air | 29 | 0 | 1 | more than 90% external source | 835 | 17 | 68 |
Intensive | 1242 | 38 | 110 | >90% home raised | 189 | 10 | 21 |
Missing observations | 229 | 8 | 13 | 10-90% home raised | 476 | 19 | 35 |
Type of herd | Control of rodents | ||||||
Selection and Multiplication Unit | 292 | 8 | 30 | No | 1254 | 42 | 114 |
Production Unit | 1208 | 38 | 94 | Yes | 246 | 4 | 10 |
Region of the herd | Source of semen | ||||||
Alentejo | 229 | 8 | 13 | Insemination centre – IC | 491 | 11 | 18 |
Centre | 278 | 8 | 34 | Own boar + IC | 869 | 23 | 88 |
Lisbon and Tagus Valley | 914 | 27 | 59 | Boar from another herd | 79 | 9 | 12 |
North | 79 | 3 | 18 | Missing observations | 61 | 3 | 6 |
Type of production | Source of replacement pigs | ||||||
Farrow-to-weaners | 164 | 5 | 21 | Just own herd | 585 | 14 | 41 |
Farrow-to-growers | 250 | 7 | 13 | Others sources | 906 | 31 | 83 |
Farrow-to-finish | 794 | 26 | 60 | Missing observations | 9 | 1 | 0 |
Missing observations | 292 | 8 | 30 | Number of finishers pigs/herd | |||
Number of boars | <100 | 263 | 3 | 14 | |||
<3 | 715 | 22 | 33 | ≥100 | 1221 | 42 | 107 |
≥3 | 785 | 24 | 91 | Missing observations | 16 | 1 | 3 |
Number of sows | Control of birds | ||||||
<170 | 759 | 16 | 55 | No | 1192 | 34 | 94 |
≥170 | 741 | 30 | 69 | Yes | 308 | 12 | 30 |
Number of gilts | Use of foot bath | ||||||
<22 | 713 | 20 | 47 | No | 1017 | 38 | 85 |
≥22 | 787 | 26 | 77 | Yes | 483 | 8 | 39 |
Size of the herd (number of breeding pigs) | Clothes for exclusive use in the herd | ||||||
<203 | 759 | 16 | 55 | Yes | 1423 | 46 | 121 |
≥203 | 741 | 30 | 69 | No | 77 | 0 | 3 |
Management of breeding boars | Herd replacement policy | ||||||
more than 90% external source | 606 | 24 | 70 | Good | 434 | 7 | 29 |
without boars or >90% home raised | 735 | 15 | 40 | Bad | 1066 | 39 | 95 |
Biosecurity measures | |||||||
10-90% external source or home raised | 159 | 7 | 14 | Yes | 828 | 30 | 72 |
No | 672 | 16 | 52 | ||||