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Odds ratios (OR) from multivariate analysis of potential risk factors for farms being infected with Salmonella Cubana in the outbreak in pig farms in Sweden 2003. |
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| OR (90% CI |
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| Farm positive in feed and/or faeces (n = 49) |
Farm positive in faeces (n = 31) |
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| Type of production: |
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| Integrated vs piglet |
3.19 (0.29 – 35.0) |
N.i. |
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| Fattening vs piglet |
38.2 (1.57 – 927.8) |
N.i. |
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| Herd size: |
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| No. of pigs (OR per extra 100 pigs) |
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| piglet producing |
1.17 (0.90 – 1.52) |
N.i. |
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| fattening |
0.84 (0.57 – 1.52) |
N.i. |
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| integrated |
1.05 (0.80–1.79) |
N.i. |
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| 1–5 stable units vs ≥ 11 |
N.i. |
0.22 (0.06 – 0.75) |
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| 6–10 stable units vs ≥ 11 |
N.i. |
0.31 (0.08 – 1.23) |
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| Type of feed: |
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| Other feed types vs soy |
0.08 (0.01 – 0.75) |
N.i. |
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| First feed delivery week: |
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| 18 vs 22–23 |
N.i. |
0.27 (0.04 – 1.98) |
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| 19 vs 22–23 |
N.i. |
0.22 (0.05 – 0.89) |
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| 20 vs 22–23 |
N.i. |
0.33 (0.07 – 1.50) |
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| 21 vs 22–23 |
N.i. |
0.15 (0.02 – 1.15) |
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Reference variables (baseline) are written in italics. N.i. = not included, (not significant in the univariate analysis). | |||
Österberg et al. Acta Veterinaria Scandinavica 2006 47:13 doi:10.1186/1751-0147-47-13 |
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