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Table 2 The final statistical model based on data from 545 turkey grow-outs started during 2010–2016

From: The incidence of necrotic enteritis in turkeys is associated with farm, season and faecal Eimeria oocyst counts

Variable Variable level Number of grow-outs Odds ratio p-value 95 % Confidence interval
Farm Random effect 545 - < 0.001 -
Season January-March (reference) 137 1.00 - -
  April-June 127 0.60 0.124 0.31–1.15
  July-September 140 0.41 0.007 0.21–0.79
  October-December 141 0.61 0.117 0.33–1.13
Grow-out sizea < 6000 (reference) 83 1.00 - -
6000 or more 462 2.78 0.052 0.94–7.47
Feed mill 1 (reference) 291 1.00 - -
  2 163 1.32 0.456 0.63–2.77
  3 43 3.03 0.049 1.00-9.17
  4 27 0.78 0.734 0.19–3.23
  5b 21 1.43 0.600 0.37–5.51
  1. Only variables associated with incidence of necrotic enteritis are displayed in the table
  2. aNumber of day-old turkeys housed on the same day on the same farm
  3. bGrow-outs offered feeds from five different feed mills