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Table 1 Crude odds ratios before and after removal of records with missing data: scenario 1 analyses

From: Generating social network data using partially described networks: an example informing avian influenza control in the British poultry industry

  Full data (n = 662 farms) Following the removal of records (n = 348 farms)  
Farm-level predictors ORa s.e. ORb p-value ORa s.e. ORb p-value % change
L vs. S bird counte 0.284 1.292 <0.0001 0.185 1.367 <0.0001 34.9c
L vs. S house counte 0.354 1.306 <0.0001 0.299 1.327 <0.0001 15.5
Indoors 0.298 1.289 <0.0001 0.301 1.307 <0.0001 1.0
Free-range 5.266 1.298 <0.0001 5.010 1.317 <0.0001 4.9
Housing other 0.829 1.510 0.650 0.598 1.590 0.268 27.9c
Partial housing 1.009 1.941 0.990 0.763 2.209 0.733 24.4
Integrated 0.271 1.222 <0.0001 0.258 1.309 <0.0001 4.8
East 1.905 1.298 0.014 2.545 1.392 0.005 25.1
Scotland 0.333 2.144 0.150 0.308 2.899 0.268 7.5
Wales 0.119 2.087 0.004 0.192 2.848 0.115 38.0d
West 0.418 1.287 0.001 0.401 1.429 0.010 4.1
  1. aOR = odds ratio; bs.e. = standard error of the odds ratio; c >25% change in odds ratio but direction of association and significance is comparable; dsingle variable for which there is >25% change in odds ratio and no change in direction of association, but significance is altered; eL = large, S = small.