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Table 2 Three-way analysis of variance in the first trial.

From: Quality assessment of an interferon-gamma release assay for tuberculosis infection in a resource-limited setting

  Nil TB-Antigen Mitogen
Mean (IU/ml) 0.7821 5.4013 15.3638
Harvest    
   Mean Square 0.0000 1.5252 51.2656
   F value 0.0000 0.2200 2.5600
   P value 0.9984 0.6482 0.1404
ELISA    
   Mean Square 1.8838 12.3026 161.3535
   F value 1.2600 1.7800 8.0700
   P value 0.2847 0.2112 0.0175
Error    
   Mean Square 1.4741 6.8935 19.9916
   Root Mean Square 1.2142 2.6255 4.4712
Coefficient of Variation (%) 155.2476 48.6099 29.1022