Skip to main content

Table 5 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      0.441 0.056  
Triplet codea Reactive 24 1885 4689    
  Proactive 12 1433 2990 1.105 0.127 < 0.01
  Survey 16 917 2423 0.035 0.121 0.77
Restock No 40 3151 7673    
  Yes 14 1090 2510 -0.110 0.072 0.13
Farm location Area A 24 3651 4285    
  Area B 25 3985 5263 -0.129 0.115 0.26
  Area C 5 255 635 -0.069 0.162 0.67
Age (years) 2 44 699 760    
  3 51 1432 1618 0.054 0.031 0.08
  4 53 1583 1850 0.078 0.032 0.01
  5 50 1272 1450 0.143 0.034 < 0.01
  6 51 1120 1296 0.162 0.035 < 0.01
  7 46 793 1045 0.195 0.037 < 0.01
  8 39 383 773 0.178 0.040 < 0.01
  9 25 135 545 0.201 0.044 < 0.01
  ≥ 10 8 16 846 0.160 0.045 < 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 0.004, (s.e. 0.010)
  4. Cattle variance 0.625 (s.e. 0.015)
  5. Visit variance 0.248, (s.e. 0.005)