Comparative Study:
A comparative study was performed to demonstrate the equivalence of the various our ENA ELISA test systems to other commercially available autoantibody ELISA test systems. The performance of the ELISAs was evaluated using 337* serum specimens; 152 normal donor samples from the northeastern and southeastern United States, and 185 disease-state repository samples previously characterized with respect to autoantibody activity. The results of the investigation have been summarized in Tables 1 and 2 below:
* The total population tested for anti-Jo-1 was 126; 64 normal donor samples, and 62 of the disease-state repository samples.

A. Number of specimens reactive on our Test System.
B. Number of specimens reactive on Commercial ELISA Test System.
C. Number of discrepant specimens.
D. Number of positive specimens in the population after resolution of the discrepant specimens using alternate methodology such as gel immunodiffusion (GID), IFA, and third-party ELISA tests.

A. Number of specimens non-reactive on our Test System.
B. Number of specimens non-reactive on Commercial ELISA Test System.
C. Number of discrepant specimens.
D. Number of non-reactive specimens in the population after resolution of the discrepant specimens using alternate methodology such as gel immunodiffusion (GID), IFA, and third-party ELISA tests.