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Table 4 Multi-level model of fixed effects associated with N. caninum antibody level (S/P ratio) for the herds with a mean herd seroprevalence < 10% (Dataset B).

From: A four year longitudinal sero-epidemiology study of Neospora caninumin adult cattle from 114 cattle herds in south west England: Associations with age, herd and dam-offspring pairs

Variable Category No. herds No. cattle No. obs. Coef SEb P value
Intercept      0.191 0.025  
Triplet codea Reactive 14 1441 3284    
  Proactive 22 3233 7258 -0.004 0.025 0.87
  Survey 21 2270 5682 0.026 0.029 0.37
Restock No 48 6106 14284    
  Yes 10 846 1970 -0.090 0.030 < 0.01
Farm location Area A 12 720 1865    
  Area B 40 5365 12320 -0.034 0.030 0.26
  Area C 6 868 2069 -0.025 0.045 0.59
Replacement cattle Homebred 54 4611 9188    
  Purchased 59 2341 4416 0.123 0.018 < 0.01
  1. aPart of the Randomised Badger Culling Trial (RBCT) in the south west region with three treatments – reactive proactive or no culling of badgers (survey only)
  2. b Standard Error
  3. Herd variance 0.002, (s.e. 0.001)
  4. Cattle variance 0.196 (s.e. 0.004)
  5. Visit variance 0.075, (s.e. 0.001)