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Table 2 Farm-level factors associated with number of animals seropositive to Toxoplasma gondii in 33 dairy sheep flocks: results of a negative binomial regression model

From: Seroprevalence and risk factors for Toxoplasma gondii in sheep in Grosseto district, Tuscany, Italy

Variable Level Count ratio 95%CI(CR) P-value
Size of flock <300 1*
  300-400 0.83 0.55, 1.26 0.377
  >400 0.62 0.41, 0.95 0.028
Access of stray cats to animals’ water No 1*
  Yes 1.54 1.05, 2.26 0.027
ln(number tested) (exposure)
  1. * Reference level.