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. 2006 Jan;13(1):53–58. doi: 10.1128/CVI.13.1.53-58.2006

TABLE 2.

Concordance and kappa (κ) statistic for the TST and IFN-γ assay (n = 409)

TST IFN-γa assay
Total
No. positive No. negative
Positive 9 28 37
Negative 13 359 372
Total 22 387 409
a

Concordance (%), 95% CI: 90.0, 0.87 to 0.93. κ, 95% CI: 0.25, 0.10 to 0.41.