TABLE 3.

Overall rates of correct classification (ARCC) for different reductions in numbers of drugs and species classifications for three DA methods: results from cross-validation analysis

Approach (probability due to random chance)% of isolates correctly classified by DA method, best group for identificationa
LinearQuadraticEpanechnikov
Twelve drugs; eight species (12.5%)28.7,* swine (49)25.6, wildlife (75)27.5, humans (67)
Reduced drugs; eight species (12.5%)30.8, swine (50)27.7, wildlife (75)37.3,* wildlife (89)
Twelve drugs; six species (16.7%)35.0,* swine (59)33.1, wildlife (80)33.8, humans (67)
Reduced drugs; six species (16.7%)37.1, swine (57)35.0, wildlife (78)54.5,* humans (100)
Twelve drugs; five species (20%)33.6, livestockb (67)32.7, wildlife (83)42.3,* humans (100)
Reduced drugs, five species (20%)36.3, livestockb (67)35.4, wildlife (80)51.5,* wildlife (89)
Twelve drugs; four species (25%)32.6, food animalsc (82)36.8, wildlife (84)48.7,* humans (100)
Reduced drugs; four species (25%)39.0, food animalsc (80)40.7, wildlife (81)67.9,* humans (100)
  • a *, best model by approach; the value in parentheses following the best group for identification is the percentage of isolates correctly identified in the group.

  • b The livestock group is a combination of beef and dairy cattle, sheep, and swine.

  • c The food animal group is a combination of beef and dairy cattle, sheep, swine, and poultry.