From: Insights into udder health and intramammary antibiotic usage on Irish dairy farms during 2003-2010
Variable | Â | b | S. E. | p-value | OR | 95% CI | |
---|---|---|---|---|---|---|---|
Intercept | Â | -0.72 | 0.04 | < 0.001 | 0.49 | 0.45 | 0.52 |
Month | 1 | 0.00 | 0.00 | . | 1.00 | 1.00 | 1.00 |
2 | 0.17 | 0.03 | < 0.001 | 1.18 | 1.12 | 1.24 | |
3 | 0.28 | 0.03 | < 0.001 | 1.32 | 1.26 | 1.39 | |
4 | 0.48 | 0.03 | < 0.001 | 1.62 | 1.54 | 1.71 | |
5 | 0.53 | 0.03 | < 0.001 | 1.70 | 1.62 | 1.79 | |
6 | 0.33 | 0.03 | < 0.001 | 1.39 | 1.32 | 1.47 | |
7 | 0.00 | 0.03 | 0.908 | 1.00 | 0.95 | 1.06 | |
8 | -0.04 | 0.03 | 0.133 | 0.96 | 0.91 | 1.01 | |
9 | -0.12 | 0.03 | < 0.001 | 0.89 | 0.84 | 0.94 | |
10 | -0.29 | 0.03 | < 0.001 | 0.75 | 0.71 | 0.79 | |
11 | -0.40 | 0.03 | < 0.001 | 0.67 | 0.64 | 0.71 | |
12 | -0.29 | 0.03 | < 0.001 | 0.75 | 0.71 | 0.80 | |
Year | 2004 | 0.00 | 0.00 | . | 1.00 | 1.00 | 1.00 |
2005 | -0.15 | 0.02 | < 0.001 | 0.86 | 0.82 | 0.90 | |
2006 | -0.19 | 0.03 | < 0.001 | 0.82 | 0.78 | 0.87 | |
2007 | -0.06 | 0.03 | 0.036 | 0.94 | 0.89 | 1.00 | |
2008 | 0.03 | 0.03 | 0.284 | 1.03 | 0.97 | 1.09 | |
2009 | -0.26 | 0.03 | < 0.001 | 0.77 | 0.73 | 0.82 | |
2010 | -0.48 | 0.03 | < 0.001 | 0.62 | 0.58 | 0.66 | |
Herd sizea | Q1 | 0.00 | 0.00 | . | 1.00 | 1.00 | 1.00 |
Q2 | -0.10 | 0.03 | 0.001 | 0.91 | 0.86 | 0.96 | |
Q3 | -0.15 | 0.03 | < 0.001 | 0.86 | 0.81 | 0.91 | |
Q4 | -0.36 | 0.03 | < 0.001 | 0.70 | 0.65 | 0.75 | |
Spring calving | Non-Spring | 0.00 | 0.00 | . | 1.00 | 1.00 | 1.00 |
Spring | -0.10 | 0.08 | 0.211 | 0.91 | 0.78 | 1.06 | |
Spring × Monthb | Spring: 1 | 0.00 | 0.00 | . | 1.00 | 1.00 | 1.00 |
Spring: 2 | 0.47 | 0.07 | < 0.001 | 1.61 | 1.39 | 1.86 | |
Spring: 3 | 0.40 | 0.07 | < 0.001 | 1.49 | 1.30 | 1.72 | |
Spring: 4 | 0.38 | 0.07 | < 0.001 | 1.46 | 1.27 | 1.68 | |
Spring: 5 | 0.38 | 0.07 | < 0.001 | 1.46 | 1.27 | 1.68 | |
Spring: 6 | 0.42 | 0.07 | < 0.001 | 1.53 | 1.33 | 1.76 | |
Spring: 7 | 0.49 | 0.07 | < 0.001 | 1.63 | 1.41 | 1.88 | |
Spring: 8 | 0.46 | 0.07 | < 0.001 | 1.58 | 1.37 | 1.83 | |
Spring: 9 | 0.36 | 0.07 | < 0.001 | 1.44 | 1.24 | 1.66 | |
Spring: 10 | 0.14 | 0.07 | 0.056 | 1.15 | 1.00 | 1.33 | |
Spring: 11 | -0.27 | 0.08 | 0.001 | 0.76 | 0.66 | 0.89 | |
Spring: 12 | -0.37 | 0.09 | < 0.001 | 0.69 | 0.58 | 0.83 | |
Spring × Yearb | Spring: 2004 | 0.00 | 0.00 | . | 1.00 | 1.00 | 1.00 |
Spring: 2005 | 0.05 | 0.04 | 0.221 | 1.05 | 0.97 | 1.15 | |
Spring: 2006 | 0.07 | 0.05 | 0.107 | 1.08 | 0.98 | 1.18 | |
Spring: 2007 | 0.11 | 0.05 | 0.017 | 1.12 | 1.02 | 1.23 | |
Spring: 2008 | 0.08 | 0.05 | 0.076 | 1.09 | 0.99 | 1.20 | |
Spring: 2009 | 0.17 | 0.05 | 0.001 | 1.19 | 1.08 | 1.31 | |
Spring: 2010 | 0.31 | 0.05 | < 0.001 | 1.36 | 1.23 | 1.51 |