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Table 3 Agreement and correlation between the results of the PRRSV Ab ELISAs tested

From: Performance of ELISAs for detection of antibodies against porcine respiratory and reproductive syndrome virus in serum of pigs after PRRSV type 2 live vaccination and challenge

   IDEXX Agreement (κ) Correlation coefficient
   Positive Negative Sum
INgezim Positive 112 8 120 0.89 0.90
Negative 0 50 50
QIAGEN Positive 110 6 116 0.89 0.90
Negative 2 52 54
AJ Positive 103 3 106 0.85 0.85
Negative 9 55 64
Sum   112 58 170   
    AJ    
HIPRA Positive 89 0 89 0.80 0.81
  Negative 17 64 81
QIAGEN Positive 105 11 116 0.85 0.85
  Negative 1 53 54
Sum   106 64 170   
    INgezim    
QIAGEN Positive 116 0 116 0.95 0.95
Negative 4 50 54
AJ Positive 106 0 106 0.82 0.83
Negative 14 50 64
Sum   120 50 170   
  1. Results of groups V and N included, Correlation coefficient after Spearman given