New crossmatch assay "X" was evaluated in your laboratory. 100 cell-sera combinations were chosen and then tested using AHG-CDC and assay "X". AHG-CDC identified 50 positive crossmatches. Assay "X" reported 3 positive crossmatches that were negative by AHG-CDC. Assay "X" reported 17 negative crossmatches that were positive by CDC. All other results were the same. What is the concordance between these assays?
A. 51%
B. 17%
C. 3%
D. 80%
Answer:D
New crossmatch assay "X" was evaluated in your laboratory. 100 cell-sera combinations were chosen and then tested using AHG-CDC and assay "X". AHG-CDC identified 50 positive crossmatches. Assay "X" reported 3 positive crossmatches that were negative by AHG-CDC. Assay "X" reported 17 negative crossmatches that were positive by CDC. All other results were the same. What is the concordance between these assays?
A. 51% B. 17% C. 3% D. 80%