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Table 4 Risk factors associated with a positive infection status (comparison of infected herds vs. control herds)

From: Observed management practices in relation to the risk of infection with paratuberculosis and to the spread of Mycobacterium avium subsp. paratuberculosisin Swiss dairy and beef herds

Variables % cases/% controls OR1 95% CI2 p-value
All herds     
 Animal purchase3 53/16 7.25 1.86-28.34 0.004
Dairy herds     
 Animal purchase3 60/23 6.34 1.18-34.13 0.031
Beef herds     
 No significant factors     
  1. 1OR = odds ratio.
  2. 295% CI = 95% confidence interval.
  3. 3Farms that purchased two or more animals per year on average compared to farms that purchased up to one animal per year on average.