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Table 6 One-factor logistic regression analyses on MAT outcome. Stratified by reason for sampling

From: Passive surveillance of Leptospira infection in swine in Germany

Effect number Positives % ORa CI b pc
lower upper
Reason: monitoring
2011 (ref) 392 9.2 1
2012 400 20.5 2.450 1.386 4.331 0.0022
2013 338 15.1 1.623 0.876 3.007 0.1231
2014 298 15.8 1.538 0.818 2.895 0.1806
2015 300 23.7 2.768 1.496 5.123 0.0013
2016 / 01 to 09 85 23.5 2.840 1.161 6.948 0.0224
Reason: reproductive problems
2011 (ref) 2514 18.0 1
2012 2422 18.3 1.051 0.863 1.280 0.6223
2013 2249 20.5 1.071 0.874 1.312 0.5075
2014 2087 23.8 1.326 1.081 1.627 0.0068
2015 1582 27.6 1.679 1.355 2.080 <.0001
2016 / 01 to 09 1163 32.0 2.301 1.822 2.906 <.0001
Reason: unknown
2011 (ref) 3002 15.9 1
2012 2650 19.6 1.284 1.055 1.562 0.0127
2013 2981 18.9 1.131 0.928 1.377 0.2233
2014 2721 16.5 1.076 0.878 1.319 0.4813
2015 2851 17.6 1.603 1.296 1.983 <.0001
2016 / 01 to 09 1794 30.6 2.585 2.078 3.215 <.0001
  1. aOdds ratios adjusted for year, reason, and interaction
  2. blower/upper bound 95% confidence interval for the odds ratio
  3. cp-value for Wald test