Table 1.

Antithrombin levels with antigen and activity methods

Antigen (Lia test), %Thrombin-based activity test, %Factor Xa–based activity test, %
Proband (our results) 93 60-64 110  
Proband (Canadian results) NA 72-74 53-56 
Sister (our results) 86 62 92  
Brother (our results) 92 55 89 
Antigen (Lia test), %Thrombin-based activity test, %Factor Xa–based activity test, %
Proband (our results) 93 60-64 110  
Proband (Canadian results) NA 72-74 53-56 
Sister (our results) 86 62 92  
Brother (our results) 92 55 89 

NA indicates not applicable.

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