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Table 3 Univariable analysis results of potential risk factors associated with sero-positivity of sheep population against Brucella spp.

From: Sero-epidemiology and associated risk factors of brucellosis among sheep and goat population in the south western Nepal: a comparative study

Determinants Total no. of sheep Brucella positive Brucella negative Odds ratio (OR) 95% CI P value
Animal Origin
 Purchased 12 3 9 2.19 (0.85, 2.21) 0.32
 Homebred 68 9 59 Ref   
Age (median = 1.5 years)
  > 1.5 37 9 28 4.29 (1.16, 20.63) 0.041*
  ≤ 1.5 43 3 40 Ref   
Herd size (median = 100)
  > 100 24 7 17 4.2 (1.19,15.91) 0.026*
  ≤ 100 56 5 51 Ref   
Parity (median = 1)
  > 1 24 6 18 4.11 (0.98,21.29) 0.055
  ≤ 1 40 3 37 Ref   
Gender       
 Male 16 3 13 1.41 (0.28,5.53) 0.646
 Female 64 9 55 Ref   
Grazing
 Yes 74 12 62 2.6 (0.12, 49.16) 0.154
 No 6 0 6 Ref   
Repeat breeding
 Yes 11 3 8 2.94 (0.62,2.63) 0.199
 No 53 6 47 Ref   
  1. *P value< 0.05 means statistically significant