Skip to main content

Table 2 Univariable analysis of the exposure variables relative to the animal seropositivity outcome

From: Serological evidence of bluetongue virus infection and serotype distribution in dairy cattle in South Korea

  Negative (N=381) Positive (N=85) OR (95% CI) p value
Land use
 Agricultural 117 30 1.262 (0.705 - 2.259) 0.432
 Woodland and semi-natural 136 29 1.050 (0.587 - 1.878) 0.870
 Urban 128 26 - -
Herd size
 ≤5 122 30 2.762 (1.380 - 5.527) 0.003
 6-30 113 42 4.174 (2.139 - 8.148) <0.001
 ≥31 146 13 - -
Cattle density
 ≤10 120 30 1.625 (0.876 - 3.014) 0.121
 11-20 131 35 1.737 (0.953 - 3.166) 0.070
 ≥21 130 20 - -
Adult/calf ratios
 ≤1.0 135 20 0.653 (0.348 - 1.224) 0.182
 1.1-2.0 127 38 1.319 (0.759 - 2.293) 0.326
 ≥2.1 119 27 - -
Age class
 Juvenile 145 18 0.294 (0.159 - 0.541) <0.001
 Subadult 139 26 0.443 (0.254 - 0.771) 0.004
 Adult 97 41 - -
Reproductive problems
 Yes 173 41 1.120 (0.700 - 1.794) 0.636
 No 208 44 - -
Southern vs northern
 Southern 253 45 1.757 (1.092 - 2.828) 0.019
 Northern 128 40 - -
Eastern vs western
 Eastern 128 18 0.531 (0.303 - 0.932) 0.026
 Western 253 67 - -