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Table 5 Logit binary logistic regression of tick and lice infestation in buffaloes in the municipality of Santarém, Amazon region, Brazil

From: Prevalence and risk factors associated with ectoparasite infestation of buffaloes in an Amazonian ecosystem

Variablea Ticks Lice
OR 95% CI P b OR 95% CI P b
Age (months)
 1 to 12 5.99 2.48–14.51 0.001 Baseline   
 13 to 24 1.05 0.42–2.64 0.922 3.83 1.83–8.01 0.001
 > 24 Baseline    2.07 0.95–4.53 0.069
Farm site
 Dry land 16.68 2.26–123.27 0.006 5.72 2.55–12.83 0.001
 Floodplain Baseline    Baseline   
Origin
 Bought 3.61 1.42–9.15 0.007  
 Born on farm Baseline    
  1. aOnly factors that remained significantly associated in the final model (P < 0.05) are included
  2. bLogit binary regression analysis with Backward stepwise elimination in a hierarchic model. Hosmer-Lemeshow goodness-of-fit test: P = 0.233 (ticks), P = 0.480 (lice)
  3. Abbreviations: OR, odds ratio; CI, confidence interval