Sample typec | No. of samples | % Valued | κe |
---|
| N | PA | NA | FN | TP | FP | AC | SE | SP | |
---|
Minced meat | 60 | 30 | 30 | 0 | 0 | 0 | 100 | 100 | 100 | 1.00 |
Poultry neck-skins | 60 | 27 | 31 | 0 | 2 | 0 | 97 | 107 | 100 | 0.97 |
Pig carcass swabs | 120 | 21 | 98 | 1 | 0 | 0 | 99 | 95 | 100 | 0.97 |
TOTAL
|
240
|
78
|
159
|
1
|
2
|
0
|
99
|
103
|
100
|
0.97
|
- a PA: Positive Agreement, NA: Negative Agreement, TP: True Positive, FN: False Negative, FP: False Positive, AC: Relative Accuracy, SE: Relative Sensitivity, SP: Relative Specificity, N = PA +NA + FN + TP + FP.
- b Results are given after confirmation.
- c Matrices as defined by NordVal [15]; matrix meat: minced meat (raw pork and veal) and poultry neck skins, matrix environmental samples: pig carcass swabs. Meat samples were artificially contaminated and swab samples potentially naturally contaminated.
- d See Materials and Methods for accuracy, sensitivity and specificity equations.
- e Cohen's kappa calculated according to NMKL procedure no. 20 [26].